Harmonizome 3.0

microsomal triglyceride transfer protein

MTP encodes the large subunit of the heterodimeric microsomal triglyceride transfer protein. Protein disulfide isomerase (PDI) completes the heterodimeric microsomal triglyceride transfer protein, which has been shown to play a central role in lipoprotein assembly. Mutations in MTP can cause abetalipoproteinemia. [provided by RefSeq, Jul 2008]

low density lipoprotein receptor class A domain containing 1

Predicted to be located in membrane. [provided by Alliance of Genome Resources, Mar 2025]

low density lipoprotein receptor class A domain containing 2

Predicted to be located in membrane. [provided by Alliance of Genome Resources, Mar 2025]

low density lipoprotein receptor class A domain containing 3

Predicted to enable amyloid-beta binding activity. Predicted to be involved in receptor-mediated endocytosis. Predicted to act upstream of or within regulation of protein processing. Predicted to be located in membrane. Predicted to be active in plasma membrane. [provided by Alliance of Genome Resources, Mar 2025]

low density lipoprotein receptor-related protein 2

The protein encoded by this gene, low density lipoprotein-related protein 2 (LRP2) or megalin, is a multi-ligand endocytic receptor that is expressed in many different tissues but primarily in absorptive epithilial tissues such as the kidney. This glycoprotein has a large amino-terminal extracellular domain, a single transmembrane domain, and a short carboxy-terminal cytoplasmic tail. The extracellular ligand-binding-domains bind diverse macromolecules including albumin, apolipoproteins B and E, and lipoprotein lipase. The LRP2 protein is critical for the reuptake of numerous ligands, including lipoproteins, sterols, vitamin-binding proteins, and hormones. This protein also has a role in cell-signaling; extracellular ligands include parathyroid horomones and the morphogen sonic hedgehog while cytosolic ligands include MAP kinase scaffold proteins and JNK interacting proteins. Recycling of this membrane receptor is regulated by phosphorylation of its cytoplasmic domain. Mutations in this gene cause Donnai-Barrow syndrome (DBS) and facio-oculoacoustico-renal syndrome (FOAR).[provided by RefSeq, Aug 2009]

low density lipoprotein receptor-related protein 3

Involved in negative regulation of fat cell differentiation; positive regulation of osteoblast differentiation; and regulation of gene expression. Predicted to be located in membrane. Predicted to be active in plasma membrane. [provided by Alliance of Genome Resources, Mar 2025]

low density lipoprotein receptor-related protein 1

This gene encodes a member of the low-density lipoprotein receptor family of proteins. The encoded preproprotein is proteolytically processed by furin to generate 515 kDa and 85 kDa subunits that form the mature receptor (PMID: 8546712). This receptor is involved in several cellular processes, including intracellular signaling, lipid homeostasis, and clearance of apoptotic cells. In addition, the encoded protein is necessary for the alpha 2-macroglobulin-mediated clearance of secreted amyloid precursor protein and beta-amyloid, the main component of amyloid plaques found in Alzheimer patients. Expression of this gene decreases with age and has been found to be lower than controls in brain tissue from Alzheimer's disease patients. [provided by RefSeq, Oct 2015]

low density lipoprotein receptor-related protein 6

This gene encodes a member of the low density lipoprotein (LDL) receptor gene family. LDL receptors are transmembrane cell surface proteins involved in receptor-mediated endocytosis of lipoprotein and protein ligands. The protein encoded by this gene functions as a receptor or, with Frizzled, a co-receptor for Wnt and thereby transmits the canonical Wnt/beta-catenin signaling cascade. Through its interaction with the Wnt/beta-catenin signaling cascade this gene plays a role in the regulation of cell differentiation, proliferation, and migration and the development of many cancer types. This protein undergoes gamma-secretase dependent RIP- (regulated intramembrane proteolysis) processing but the precise locations of the cleavage sites have not been determined.[provided by RefSeq, Dec 2009]

low density lipoprotein receptor-related protein 4

This gene encodes a member of the low-density lipoprotein receptor-related protein family. The encoded protein may be a regulator of Wnt signaling. Mutations in this gene are associated with Cenani-Lenz syndrome. [provided by RefSeq, May 2010]

low density lipoprotein receptor-related protein 5

This gene encodes a transmembrane low-density lipoprotein receptor that binds and internalizes ligands in the process of receptor-mediated endocytosis. This protein also acts as a co-receptor with Frizzled protein family members for transducing signals by Wnt proteins and was originally cloned on the basis of its association with type 1 diabetes mellitus in humans. This protein plays a key role in skeletal homeostasis and many bone density related diseases are caused by mutations in this gene. Mutations in this gene also cause familial exudative vitreoretinopathy. Alternative splicing results in multiple transcript variants. [provided by RefSeq, May 2014]

low density lipoprotein receptor-related protein 8, apolipoprotein e receptor

This gene encodes a member of the low density lipoprotein receptor (LDLR) family. Low density lipoprotein receptors are cell surface proteins that play roles in both signal transduction and receptor-mediated endocytosis of specific ligands for lysosomal degradation. The encoded protein plays a critical role in the migration of neurons during development by mediating Reelin signaling, and also functions as a receptor for the cholesterol transport protein apolipoprotein E. Expression of this gene may be a marker for major depressive disorder. Alternatively spliced transcript variants encoding multiple isoforms have been observed for this gene. [provided by RefSeq, Jun 2011]

High density lipoprotein cholesterol level QTL 6

high density lipoprotein cholesterol level QTL 1

lipoprotein, Lp(a)-like 1

lipoprotein, Lp(a)-like 2, pseudogene

Apolipoprotein(a) is the distinguishing protein moiety of lipoprotein(a), of which elevated plasma levels are correlated with an increased risk of atherosclerosis. This gene is similar to the lipoprotein, Lp(a) gene, but all transcripts produced by this gene contain a truncated open reading frame and are candidates for nonsense-mediated decay. Consequently, this gene is considered to be a pseudogene. Alternative splicing results in multiple transcript variants. [provided by RefSeq, Jul 2009]

low density lipoprotein receptor-related protein associated protein 1

This gene encodes a protein that interacts with the low density lipoprotein (LDL) receptor-related protein and facilitates its proper folding and localization by preventing the binding of ligands. Mutations in this gene have been identified in individuals with myopia 23. Alternative splicing results in multiple transcript variants. [provided by RefSeq, Dec 2013]

oxidized low density lipoprotein (lectin-like) receptor 1

This gene encodes a low density lipoprotein receptor that belongs to the C-type lectin superfamily. This gene is regulated through the cyclic AMP signaling pathway. The encoded protein binds, internalizes and degrades oxidized low-density lipoprotein. This protein may be involved in the regulation of Fas-induced apoptosis. This protein may play a role as a scavenger receptor. Mutations of this gene have been associated with atherosclerosis, risk of myocardial infarction, and may modify the risk of Alzheimer's disease. Alternate splicing results in multiple transcript variants.[provided by RefSeq, Feb 2010]

low density lipoprotein receptor

The low density lipoprotein receptor (LDLR) gene family consists of cell surface proteins involved in receptor-mediated endocytosis of specific ligands. The encoded protein is normally bound at the cell membrane, where it binds low density lipoprotein/cholesterol and is taken into the cell. Lysosomes release the cholesterol, which is made available for repression of microsomal enzyme 3-hydroxy-3-methylglutaryl coenzyme A (HMG CoA) reductase, the rate-limiting step in cholesterol synthesis. At the same time, a reciprocal stimulation of cholesterol ester synthesis takes place. Mutations in this gene cause the autosomal dominant disorder, familial hypercholesterolemia. Alternate splicing results in multiple transcript variants.[provided by RefSeq, May 2022]

low density lipoprotein receptor-related protein 5-like

high density lipoprotein binding protein

The protein encoded by this gene binds high density lipoprotein (HDL) and may function to regulate excess cholesterol levels in cells. The encoded protein also binds RNA and can induce heterochromatin formation. [provided by RefSeq, Mar 2016]

lipolysis stimulated lipoprotein receptor

Predicted to be involved in several processes, including establishment of skin barrier; protein localization to tricellular tight junction; and tricellular tight junction assembly. Predicted to act upstream of or within maintenance of blood-brain barrier. Located in plasma membrane and tight junction. [provided by Alliance of Genome Resources, Mar 2025]

low density lipoprotein receptor class A domain containing 4

Enables R-SMAD binding activity. Involved in negative regulation of cell migration; negative regulation of epithelial to mesenchymal transition; and negative regulation of transmembrane receptor protein serine/threonine kinase signaling pathway. Located in early endosome membrane. [provided by Alliance of Genome Resources, Mar 2025]

lipoprotein lipase

LPL encodes lipoprotein lipase, which is expressed in heart, muscle, and adipose tissue. LPL functions as a homodimer, and has the dual functions of triglyceride hydrolase and ligand/bridging factor for receptor-mediated lipoprotein uptake. Severe mutations that cause LPL deficiency result in type I hyperlipoproteinemia, while less extreme mutations in LPL are linked to many disorders of lipoprotein metabolism. [provided by RefSeq, Jul 2008]

lipoprotein, Lp(a)

The protein encoded by this gene is a serine proteinase that inhibits the activity of tissue-type plasminogen activator I. The encoded protein constitutes a substantial portion of lipoprotein(a) and is proteolytically cleaved, resulting in fragments that attach to atherosclerotic lesions and promote thrombogenesis. Elevated plasma levels of this protein are linked to atherosclerosis. Depending on the individual, the encoded protein contains 2-43 copies of kringle-type domains. The allele represented here contains 15 copies of the kringle-type repeats and corresponds to that found in the reference genome sequence. [provided by RefSeq, Dec 2009]

very low density lipoprotein receptor

The low density lipoprotein receptor (LDLR) gene family consists of cell surface proteins involved in receptor-mediated endocytosis of specific ligands. This gene encodes a lipoprotein receptor that is a member of the LDLR family and plays important roles in VLDL-triglyceride metabolism and the reelin signaling pathway. Mutations in this gene cause VLDLR-associated cerebellar hypoplasia. Alternative splicing generates multiple transcript variants encoding distinct isoforms for this gene. [provided by RefSeq, Aug 2009]

very low density lipoprotein receptor pseudogene

low density lipoprotein receptor adaptor protein 1

The protein encoded by this gene is a cytosolic protein which contains a phosphotyrosine binding (PTD) domain. The PTD domain has been found to interact with the cytoplasmic tail of the LDL receptor. Mutations in this gene lead to LDL receptor malfunction and cause the disorder autosomal recessive hypercholesterolaemia. [provided by RefSeq, Jul 2008]

glycosylphosphatidylinositol anchored high density lipoprotein binding protein 1

This gene encodes a capillary endothelial cell protein that facilitates the lipolytic processing of triglyceride-rich lipoproteins. The encoded protein is a glycosylphosphatidylinositol-anchored protein that is a member of the lymphocyte antigen 6 (Ly6) family. This protein plays a major role in transporting lipoprotein lipase (LPL) from the subendothelial spaces to the capillary lumen. Mutations in this gene are the cause of hyperlipoproteinemia, type 1D. Alternate splicing results in multiple transcript variants. [provided by RefSeq, Sep 2014]

tissue factor pathway inhibitor (lipoprotein-associated coagulation inhibitor)

This gene encodes a Kunitz-type serine protease inhibitor that regulates the tissue factor (TF)-dependent pathway of blood coagulation. The coagulation process initiates with the formation of a factor VIIa-TF complex, which proteolytically activates additional proteases (factors IX and X) and ultimately leads to the formation of a fibrin clot. The product of this gene inhibits the activated factor X and VIIa-TF proteases in an autoregulatory loop. Inhibition of the encoded protein restores hemostasis in animal models of hemophilia. This gene encodes multiple protein isoforms that differ in their inhibitory activity, specificity and cellular localization. [provided by RefSeq, Jul 2016]

low density lipoprotein receptor-related protein 1B

This gene encodes a member of the low density lipoprotein (LDL) receptor family. These receptors play a wide variety of roles in normal cell function and development due to their interactions with multiple ligands. Disruption of this gene has been reported in several types of cancer. [provided by RefSeq, Jun 2016]

low density lipoprotein receptor-related protein 10

This gene encodes a low density lipoprotein receptor family protein. A similar protein in mouse is thought to play a role in the uptake of apolipoprotein E-containing lipoproteins. [provided by RefSeq, Jul 2016]

low density lipoprotein receptor-related protein 11

Enables phosphoprotein binding activity. Predicted to be involved in several processes, including response to cold; response to immobilization stress; and response to water deprivation. Predicted to be located in plasma membrane. [provided by Alliance of Genome Resources, Mar 2025]

low density lipoprotein receptor-related protein 12

This gene encodes a member of the low-density lipoprotein receptor related protein family. The product of this gene is a transmembrane protein that is differentially expressed in many cancer cells. Alternate splicing results in multiple transcript variants. [provided by RefSeq, Feb 2010]

atherosclerosis susceptibility (lipoprotein associated)

High density lipoprotein cholesterol level QTL 4

High density lipoprotein cholesterol level QTL 5

High density lipoprotein cholesterol level QTL on chromosome 8

High density lipoprotein cholesterol, low serum, 3

high density lipoprotein binding protein pseudogene

trafficking protein particle complex 6A

This gene encodes a component of the trafficking protein particle complex, which tethers transport vesicles to the cis-Golgi membrane. Loss of expression of the related gene in mouse affects coat and eye pigmentation, suggesting that the encoded protein may be involved in melanosome biogenesis. Alternatively spliced transcript variants encoding multiple isoforms have been observed for this gene. [provided by RefSeq, Aug 2012]

trafficking protein particle complex 6B

TRAPPC6B is a component of TRAPP complexes, which are tethering complexes involved in vesicle transport (Kummel et al., 2005 [PubMed 16025134]).[supplied by OMIM, Mar 2008]

trafficking protein particle complex 9

This gene encodes a protein that likely plays a role in NF-kappa-B signaling. Mutations in this gene have been associated with autosomal-recessive cognitive disability. Alternatively spliced transcript variants have been described.[provided by RefSeq, Feb 2010]

trafficking protein particle complex 8

Involved in Golgi organization and collagen biosynthetic process. Part of TRAPP complex. [provided by Alliance of Genome Resources, Mar 2025]

trafficking protein particle complex 1

This gene product plays a role in vesicular transport of proteins to the Golgi apparatus from the endoplasmic reticulum. The encoded protein is a component of the multisubunit transport protein particle (TRAPP) complex. Alternative splicing results in multiple transcript variants.[provided by RefSeq, Oct 2009]

trafficking protein particle complex 3

This gene encodes a component of the trafficking protein particle complex, which tethers transport vesicles to the cis-Golgi membrane. The encoded protein participates in the regulation of transport from the endoplasmic reticulum to the Golgi apparatus. Alternative splicing results in multiple transcript variants. [provided by RefSeq, Aug 2012]

trafficking protein particle complex 2

The protein encoded by this gene is thought to be part of a large multi-subunit complex involved in the targeting and fusion of endoplasmic reticulum-to-Golgi transport vesicles with their acceptor compartment. In addition, the encoded protein can bind c-myc promoter-binding protein 1 and block its transcriptional repression capability. Mutations in this gene are a cause of spondyloepiphyseal dysplasia tarda (SEDT). A processed pseudogene of this gene is located on chromosome 19, and other pseudogenes are found on chromosomes 8 and Y. Alternatively spliced transcript variants have been found for this gene. [provided by RefSeq, Mar 2010]

trafficking protein particle complex 5

Predicted to be involved in endoplasmic reticulum to Golgi vesicle-mediated transport. Part of TRAPP complex. [provided by Alliance of Genome Resources, Mar 2025]

trafficking protein particle complex 4

Involved in autophagy and endoplasmic reticulum to Golgi vesicle-mediated transport. Part of TRAPP complex. [provided by Alliance of Genome Resources, Mar 2025]

trafficking protein particle complex 2 pseudogene 5

trafficking protein particle complex 2 pseudogene 4

trafficking protein particle complex 2 pseudogene 7

trafficking protein particle complex 2 pseudogene 6

trafficking protein particle complex 2 pseudogene 3

trafficking protein particle complex 2 pseudogene 2

trafficking protein particle complex 2 pseudogene 9

trafficking protein particle complex 2 pseudogene 8

signal recognition particle 54kDa

Enables several functions, including 7S RNA binding activity; endoplasmic reticulum signal peptide binding activity; and guanyl ribonucleotide binding activity. Contributes to GTPase activity. Involved in granulocyte differentiation and protein targeting to ER. Located in cytosol and nucleus. Part of signal recognition particle, endoplasmic reticulum targeting. Implicated in severe congenital neutropenia 8. [provided by Alliance of Genome Resources, Mar 2025]

trafficking protein particle complex subunit 10-like

trafficking protein particle complex 11

The protein encoded by this gene is a subunit of the TRAPP (transport protein particle) tethering complex, which functions in intracellular vesicle trafficking. This subunit is involved in early stage endoplasmic reticulum-to-Golgi vesicle transport. Alternative splicing of this gene results in multiple transcript variants. [provided by RefSeq, Jan 2013]

trafficking protein particle complex 10

The protein encoded by this gene is a transmembrane protein found in the cis-Golgi complex. The encoded protein is part of the multisubunit transport protein particle (TRAPP) complex and may be involved in vesicular transport from the endoplasmic reticulum to the Golgi. Mutations in this gene could be responsible for the Unverricht-Lundborg type of progressive myoclonus epilepsy, or for autoimmune polyglandular disease type 1. [provided by RefSeq, Jul 2008]

trafficking protein particle complex 13

Predicted to be involved in endoplasmic reticulum to Golgi vesicle-mediated transport; vesicle coating; and vesicle tethering. Predicted to be located in cytosol. Predicted to be part of TRAPPIII protein complex. [provided by Alliance of Genome Resources, Mar 2025]

trafficking protein particle complex 12

Involved in several processes, including endoplasmic reticulum to Golgi vesicle-mediated transport; positive regulation of protein localization to kinetochore; and regulation of kinetochore assembly. Located in several cellular components, including endoplasmic reticulum-Golgi intermediate compartment; kinetochore; and perinuclear region of cytoplasm. Part of TRAPP complex. [provided by Alliance of Genome Resources, Mar 2025]

intracisternal A particle-promoted polypeptide

The protein encoded by this gene is a member of the kelch family of proteins, which is characterized by a 50 amino acid repeat which interacts with actin. Transcript variants have been described but their full-length nature has not been determined. [provided by RefSeq, Jul 2008]

signal recognition particle 19kDa pseudogene

signal recognition particle 72kDa pseudogene 1

trafficking protein particle complex 2-like

This gene encodes a protein that interacts with the tethering factor trafficking protein particle (TRAPP complex). TRAPP complexes mediate the contact between vescicles and target membranes, and thus, are involved in vescicle-mediated transport of proteins and lipids. The encoded protein is related to the X-linked trafficking protein particle complex 2. A related pseudogene is located on the X chromosome. Alternative splicing results in multiple transcript variants encoding different isoforms. [provided by RefSeq, Jan 2016]

trafficking protein particle complex 2B

Enables transcription corepressor binding activity; transcription regulator inhibitor activity; and transmembrane transporter binding activity. Involved in positive regulation of gene expression and skeletal system development. Located in endoplasmic reticulum; nucleus; and perinuclear region of cytoplasm. Part of TRAPP complex. [provided by Alliance of Genome Resources, Mar 2025]

signal recognition particle 19kDa pseudogene

signal recognition particle receptor, B subunit

The protein encoded by this gene has similarity to mouse protein which is a subunit of the signal recognition particle receptor (SR). This subunit is a transmembrane GTPase belonging to the GTPase superfamily. It anchors alpha subunit, a peripheral membrane GTPase, to the ER membrane. SR is required for the cotranslational targeting of both secretory and membrane proteins to the ER membrane. [provided by RefSeq, Jul 2008]

signal recognition particle 14kDa (homologous Alu RNA binding protein) pseudogene 1

signal recognition particle 68kDa

This gene encodes a subunit of the signal recognition particle (SRP). The SRP is a ribonucleoprotein complex that transports secreted and membrane proteins to the endoplasmic reticulum for processing. The complex includes a 7S RNA and six protein subunits. The encoded protein is the 68kDa component of the SRP, and forms a heterodimer with the 72kDa subunit that is required for SRP function. Alternatively spliced transcript variants encoding multiple isoforms have been observed for this gene, and three pseudogenes of this gene are located within the Smith-Magenis syndrome region on chromosome 17. [provided by RefSeq, May 2012]

vesicular stomatitis virus defective interfering particle suppression

signal recognition particle 14kDa (homologous Alu RNA binding protein)

Enables RNA binding activity. Involved in protein targeting to ER. Located in nucleus. Part of signal recognition particle, endoplasmic reticulum targeting. [provided by Alliance of Genome Resources, Mar 2025]

signal recognition particle 19kDa

Enables 7S RNA binding activity. Contributes to ribosome binding activity. Predicted to be involved in SRP-dependent cotranslational protein targeting to membrane, signal sequence recognition. Located in cytosol; nuclear body; and nucleolus. Part of signal recognition particle, endoplasmic reticulum targeting. [provided by Alliance of Genome Resources, Mar 2025]

trafficking protein particle complex 2-like pseudogene

trafficking protein particle complex 13 pseudogene 1

signal recognition particle 68kDa pseudogene 1

signal recognition particle 68kDa pseudogene 2

signal recognition particle 68kDa pseudogene 3

trafficking protein particle complex 2 pseudogene 10

signal recognition particle 9 pseudogene 1

signal recognition particle 9kDa

Predicted to enable RNA binding activity and signal recognition particle binding activity. Predicted to be involved in SRP-dependent cotranslational protein targeting to membrane. Predicted to be located in cytosol. Predicted to be part of signal recognition particle, endoplasmic reticulum targeting. [provided by Alliance of Genome Resources, Mar 2025]

signal recognition particle receptor (docking protein)

The gene encodes a subunit of the endoplasmic reticulum signal recognition particle receptor that, in conjunction with the signal recognition particle, is involved in the targeting and translocation of signal sequence tagged secretory and membrane proteins across the endoplasmic reticulum. Alternative splicing results in multiple transcript variants. [provided by RefSeq, Apr 2010]

signal recognition particle 72kDa pseudogene 2

signal recognition particle 72kDa

This gene encodes the 72 kDa subunit of the signal recognition particle (SRP), a ribonucleoprotein complex that mediates the targeting of secretory proteins to the endoplasmic reticulum (ER). The SRP complex consists of a 7S RNA and 6 protein subunits: SRP9, SRP14, SRP19, SRP54, SRP68, and SRP72, that are bound to the 7S RNA as monomers or heterodimers. SRP has at least 3 distinct functions that can be associated with the protein subunits: signal recognition, translational arrest, and ER membrane targeting by interaction with the docking protein. Mutations in this gene are associated with familial bone marrow failure. Alternatively spliced transcript variants encoding different isoforms have been found for this gene. [provided by RefSeq, Jun 2012]

trafficking protein particle complex 3-like

Predicted to be involved in endoplasmic reticulum to Golgi vesicle-mediated transport and intra-Golgi vesicle-mediated transport. Part of TRAPP complex. [provided by Alliance of Genome Resources, Mar 2025]

trafficking protein particle complex subunit 14

Enables alpha-tubulin binding activity. Involved in cilium assembly and regulation of cell population proliferation. Located in several cellular components, including microtubule cytoskeleton; midbody; and plasma membrane. Part of TRAPPII protein complex. Implicated in primary autosomal recessive microcephaly. [provided by Alliance of Genome Resources, Mar 2025]

apolipoprotein lipid transfer particle homolog