Name

NAT2 Gene

N-acetyltransferase 2 (arylamine N-acetyltransferase)

This gene encodes an enzyme that functions to both activate and deactivate arylamine and hydrazine drugs and carcinogens. Polymorphisms in this gene are responsible for the N-acetylation polymorphism in which human populations segregate into rapid, intermediate, and slow acetylator phenotypes. Polymorphisms in this gene are also associated with higher incidences of cancer and drug toxicity. A second polymorphic arylamine N-acetyltransferase gene (NAT1), is located near this gene (NAT2). [provided by RefSeq, Sep 2019]

NAT1 Gene

N-acetyltransferase 1 (arylamine N-acetyltransferase)

This gene is one of two arylamine N-acetyltransferase (NAT) genes in the human genome, and is orthologous to the mouse and rat Nat2 genes. The enzyme encoded by this gene catalyzes the transfer of an acetyl group from acetyl-CoA to various arylamine and hydrazine substrates. This enzyme helps metabolize drugs and other xenobiotics, and functions in folate catabolism. Multiple transcript variants encoding different isoforms have been found for this gene. [provided by RefSeq, Aug 2011]

LOC100420403 Gene

K(lysine) acetyltransferase 2B pseudogene

ELP6 Gene

elongator acetyltransferase complex subunit 6

Predicted to be involved in positive regulation of cell migration. Predicted to act upstream of or within several processes, including autophagosome maturation; gene expression; and homeostasis of number of retina cells. Located in cytosol and nucleus. Part of elongator holoenzyme complex. [provided by Alliance of Genome Resources, Mar 2025]

ELP5 Gene

elongator acetyltransferase complex subunit 5

Predicted to contribute to tRNA binding activity. Predicted to be involved in positive regulation of cell migration and tRNA modification. Located in cytosol and nucleoplasm. Part of elongator holoenzyme complex. [provided by Alliance of Genome Resources, Mar 2025]

ELP4 Gene

elongator acetyltransferase complex subunit 4

This gene encodes a component of the six subunit elongator complex, a histone acetyltransferase complex that associates directly with RNA polymerase II during transcriptional elongation. The human gene can partially complement sensitivity phenotypes of yeast ELP4 deletion mutants. This gene has also been associated with Rolandic epilepsy. Alternative splicing results in multiple transcript variants. [provided by RefSeq, Dec 2013]

ELP3 Gene

elongator acetyltransferase complex subunit 3

Enables acetyltransferase activity and phosphorylase kinase regulator activity. Involved in regulation of transcription by RNA polymerase II and tRNA wobble uridine modification. Located in cytosol and nucleolus. Part of elongator holoenzyme complex. [provided by Alliance of Genome Resources, Mar 2025]

ELP2 Gene

elongator acetyltransferase complex subunit 2

The protein encoded by this gene is a core subunit of the elongator complex, a histone acetyltransferase complex that associates with RNA polymerase II. In addition to histone acetylation, the encoded protein effects transcriptional elongation and may help remodel chromatin. [provided by RefSeq, May 2016]

HGSNAT Gene

heparan-alpha-glucosaminide N-acetyltransferase

This gene encodes a lysosomal acetyltransferase, which is one of several enzymes involved in the lysosomal degradation of heparin sulfate. Mutations in this gene are associated with Sanfilippo syndrome C, one type of the lysosomal storage disease mucopolysaccaridosis III, which results from impaired degradation of heparan sulfate. [provided by RefSeq, Jan 2009]

NAT9 Gene

N-acetyltransferase 9 (GCN5-related, putative)

Predicted to enable tubulin N-terminal N-acetyltransferase activity. Part of protein-containing complex. [provided by Alliance of Genome Resources, Mar 2025]

NAT8 Gene

N-acetyltransferase 8 (GCN5-related, putative)

This gene, isolated using the differential display method to detect tissue-specific genes, is specifically expressed in kidney and liver. The encoded protein shows amino acid sequence similarity to N-acetyltransferases. A similar protein in Xenopus affects cell adhesion and gastrulation movements, and may be localized in the secretory pathway. A highly similar paralog is found in a cluster with this gene. [provided by RefSeq, Sep 2008]

NAT6 Gene

N-acetyltransferase 6 (GCN5-related)

This gene encodes a member of the N-acetyltransferase family. N-acetyltransferases modify proteins by transferring acetyl groups from acetyl CoA to the N-termini of protein substrates. The encoded protein is a cytoplasmic N-acetyltransferase with a substrate specificity for proteins with an N-terminal methionine. This gene is located in the tumor suppressor gene region on chromosome 3p21.3 and the encoded protein may play a role in cancer. Alternatively spliced transcript variants encoding multiple isoforms have been observed. This gene overlaps and is on the same strand as hyaluronoglucosaminidase 3, and some transcripts of each gene share a portion of the first exon. [provided by RefSeq, Jan 2011]

NAA50 Gene

N(alpha)-acetyltransferase 50, NatE catalytic subunit

Enables histone H4 acetyltransferase activity and peptide alpha-N-acetyltransferase activity. Involved in N-terminal protein amino acid acetylation; establishment of mitotic sister chromatid cohesion; and mitotic sister chromatid cohesion, centromeric. Located in cytosol and nucleolus. Part of NatA complex. [provided by Alliance of Genome Resources, Mar 2025]

LOC642890 Gene

N(alpha)-acetyltransferase 50, NatE catalytic subunit pseudogene

LOC100129052 Gene

N(alpha)-acetyltransferase 40, NatD catalytic subunit, homolog (S. cerevisiae) pseudogene

NAA20 Gene

N(alpha)-acetyltransferase 20, NatB catalytic subunit

NAT5 is a component of N-acetyltransferase complex B (NatB). Human NatB performs cotranslational N(alpha)-terminal acetylation of methionine residues when they are followed by asparagine (Starheim et al., 2008 [PubMed 18570629]).[supplied by OMIM, Apr 2009]

NAA25 Gene

N(alpha)-acetyltransferase 25, NatB auxiliary subunit

This gene encodes the auxiliary subunit of the heteromeric N-terminal acetyltransferase B complex. This complex acetylates methionine residues that are followed by acidic or asparagine residues.[provided by RefSeq, Mar 2010]

LOC101060158 Gene

diamine acetyltransferase 1-like

ATAT1 Gene

alpha tubulin acetyltransferase 1

This gene encodes a protein that localizes to clathrin-coated pits, where it acetylates alpha tubulin on lysine 40. This process may be important in microtubule growth, for instance during chemotaxis and the formation of cilium. Alternative splicing results in multiple transcript variants. [provided by RefSeq, Jan 2016]

NATP Gene

N-acetyltransferase pseudogene

ESCO1 Gene

establishment of sister chromatid cohesion N-acetyltransferase 1

Enables identical protein binding activity; peptide-lysine-N-acetyltransferase activity; and zinc ion binding activity. Involved in peptidyl-lysine acetylation; post-translational protein acetylation; and regulation of DNA replication. Located in chromatin. [provided by Alliance of Genome Resources, Mar 2025]

LOC648927 Gene

K(lysine) acetyltransferase 7 pseudogene

CHAT Gene

choline O-acetyltransferase

This gene encodes an enzyme which catalyzes the biosynthesis of the neurotransmitter acetylcholine. This gene product is a characteristic feature of cholinergic neurons, and changes in these neurons may explain some of the symptoms of Alzheimer's disease. Polymorphisms in this gene have been associated with Alzheimer's disease and mild cognitive impairment. Mutations in this gene are associated with congenital myasthenic syndrome associated with episodic apnea. Multiple transcript variants encoding different isoforms have been found for this gene, and some of these variants have been shown to encode more than one isoform. [provided by RefSeq, May 2010]

NAT16 Gene

N-acetyltransferase 16 (GCN5-related, putative)

Predicted to enable acyltransferase activity, transferring groups other than amino-acyl groups. [provided by Alliance of Genome Resources, Mar 2025]

NAT14 Gene

N-acetyltransferase 14 (GCN5-related, putative)

Predicted to enable N-acetyltransferase activity. Predicted to be involved in DNA-templated transcription initiation and positive regulation of DNA-templated transcription. Predicted to be located in nucleus. [provided by Alliance of Genome Resources, Mar 2025]

NAT10 Gene

N-acetyltransferase 10 (GCN5-related)

The protein encoded by this gene is an RNA cytidine acetyltransferase involved in histone acetylation, tRNA acetylation, the biosynthesis of 18S rRNA, and the enhancement of nuclear architecture and chromatin organization. [provided by RefSeq, Oct 2016]

NATD1 Gene

N-acetyltransferase domain containing 1

KAT2B Gene

K(lysine) acetyltransferase 2B

CBP and p300 are large nuclear proteins that bind to many sequence-specific factors involved in cell growth and/or differentiation, including c-jun and the adenoviral oncoprotein E1A. The protein encoded by this gene associates with p300/CBP. It has in vitro and in vivo binding activity with CBP and p300, and competes with E1A for binding sites in p300/CBP. It has histone acetyl transferase activity with core histones and nucleosome core particles, indicating that this protein plays a direct role in transcriptional regulation. [provided by RefSeq, Jul 2008]

KAT2A Gene

K(lysine) acetyltransferase 2A

KAT2A, or GCN5, is a histone acetyltransferase (HAT) that functions primarily as a transcriptional activator. It also functions as a repressor of NF-kappa-B (see MIM 164011) by promoting ubiquitination of the NF-kappa-B subunit RELA (MIM 164014) in a HAT-independent manner (Mao et al., 2009 [PubMed 19339690]).[supplied by OMIM, Sep 2009]

LOC100421409 Gene

glucosamine-phosphate N-acetyltransferase 1 pseudogene

NAA40 Gene

N(alpha)-acetyltransferase 40, NatD catalytic subunit

Enables histone H2A acetyltransferase activity; histone H4 acetyltransferase activity; and peptide-serine-alpha-N-acetyltransferase activity. Predicted to be involved in chromatin remodeling. Predicted to act upstream of or within lipid metabolic process. Located in centriolar satellite; cytosol; and nucleoplasm. [provided by Alliance of Genome Resources, Mar 2025]

GNPNAT1 Gene

glucosamine-phosphate N-acetyltransferase 1

Enables identical protein binding activity. Predicted to be involved in UDP-N-acetylglucosamine biosynthetic process. Predicted to act upstream of or within cellular response to leukemia inhibitory factor. Predicted to be located in endoplasmic reticulum-Golgi intermediate compartment and late endosome. [provided by Alliance of Genome Resources, Mar 2025]

ACAT1 Gene

acetyl-CoA acetyltransferase 1

This gene encodes a mitochondrially localized enzyme that catalyzes the reversible formation of acetoacetyl-CoA from two molecules of acetyl-CoA. Defects in this gene are associated with 3-ketothiolase deficiency, an inborn error of isoleucine catabolism characterized by urinary excretion of 2-methyl-3-hydroxybutyric acid, 2-methylacetoacetic acid, tiglylglycine, and butanone. [provided by RefSeq, Feb 2009]

ACAT2 Gene

acetyl-CoA acetyltransferase 2

The product of this gene is an enzyme involved in lipid metabolism, and it encodes cytosolic acetoacetyl-CoA thiolase. This gene shows complementary overlapping with the 3-prime region of the TCP1 gene in both mouse and human. These genes are encoded on opposite strands of DNA, as well as in opposite transcriptional orientation. Alternatively spliced transcript variants encoding different isoforms have been found for this gene. [provided by RefSeq, Dec 2014]

NAA11 Gene

N(alpha)-acetyltransferase 11, NatA catalytic subunit

Enables peptide alpha-N-acetyltransferase activity. Involved in N-terminal protein amino acid acetylation. Located in several cellular components, including Golgi apparatus; centrosome; and nucleoplasm. Part of NatA complex. [provided by Alliance of Genome Resources, Mar 2025]

KAT8 Gene

K(lysine) acetyltransferase 8

This gene encodes a member of the MYST histone acetylase protein family. The encoded protein has a characteristic MYST domain containing an acetyl-CoA-binding site, a chromodomain typical of proteins which bind histones, and a C2HC-type zinc finger. Multiple transcript variants encoding different isoforms have been found for this gene. [provided by RefSeq, Feb 2012]

KAT5 Gene

K(lysine) acetyltransferase 5

The protein encoded by this gene belongs to the MYST family of histone acetyl transferases (HATs) and was originally isolated as an HIV-1 TAT-interactive protein. HATs play important roles in regulating chromatin remodeling, transcription and other nuclear processes by acetylating histone and nonhistone proteins. This protein is a histone acetylase that has a role in DNA repair and apoptosis and is thought to play an important role in signal transduction. Alternative splicing of this gene results in multiple transcript variants. [provided by RefSeq, Jul 2008]

KAT7 Gene

K(lysine) acetyltransferase 7

The protein encoded by this gene is part of the multimeric HBO1 complex, which possesses histone H4-specific acetyltransferase activity. This activity is required for functional replication origins and is involved in transcriptional activation of some genes. In both cases, the acetylation of histone H4 helps unfold chromatin so that the DNA can be accessed and replicated or transcribed. [provided by RefSeq, Oct 2016]

NAA16 Gene

N(alpha)-acetyltransferase 16, NatA auxiliary subunit

Enables ribosome binding activity. Involved in N-terminal protein amino acid acetylation; negative regulation of apoptotic process; and protein stabilization. Located in cytosol. Part of NatA complex. [provided by Alliance of Genome Resources, Mar 2025]

NAA15 Gene

N(alpha)-acetyltransferase 15, NatA auxiliary subunit

N-alpha-acetylation is among the most common post-translational protein modifications in eukaryotic cells. This process involves the transfer of an acetyl group from acetyl-coenzyme A to the alpha-amino group on a nascent polypeptide and is essential for normal cell function. This gene encodes the auxillary subunit of the N-terminal acetyltransferase A (NatA) complex. [provided by RefSeq, Jan 2017]

NAA10 Gene

N(alpha)-acetyltransferase 10, NatA catalytic subunit

N-alpha-acetylation is among the most common post-translational protein modifications in eukaryotic cells. This process involves the transfer of an acetyl group from acetyl-coenzyme A to the alpha-amino group on a nascent polypeptide and is essential for normal cell function. This gene encodes an N-terminal acetyltransferase that functions as the catalytic subunit of the major amino-terminal acetyltransferase A complex. Mutations in this gene are the cause of Ogden syndrome. Alternate splicing results in multiple transcript variants. [provided by RefSeq, Jan 2012]

DLAT Gene

dihydrolipoamide S-acetyltransferase

This gene encodes component E2 of the multi-enzyme pyruvate dehydrogenase complex (PDC). PDC resides in the inner mitochondrial membrane and catalyzes the conversion of pyruvate to acetyl coenzyme A. The protein product of this gene, dihydrolipoamide acetyltransferase, accepts acetyl groups formed by the oxidative decarboxylation of pyruvate and transfers them to coenzyme A. Dihydrolipoamide acetyltransferase is the antigen for antimitochondrial antibodies. These autoantibodies are present in nearly 95% of patients with the autoimmune liver disease primary biliary cirrhosis (PBC). In PBC, activated T lymphocytes attack and destroy epithelial cells in the bile duct where this protein is abnormally distributed and overexpressed. PBC enventually leads to cirrhosis and liver failure. Mutations in this gene are also a cause of pyruvate dehydrogenase E2 deficiency which causes primary lactic acidosis in infancy and early childhood.[provided by RefSeq, Oct 2009]

NAA60 Gene

N(alpha)-acetyltransferase 60, NatF catalytic subunit

This gene encodes an enzyme that localizes to the Golgi apparatus, where it transfers an acetyl group to the N-terminus of free proteins. This enzyme acts on histones, and its activity is important for chromatin assembly and chromosome integrity. Alternative splicing and the use of alternative promoters results in multiple transcript variants. The upstream promoter is located in a differentially methylated region (DMR) and undergoes imprinting; transcript variants originating from this position are expressed from the maternal allele. [provided by RefSeq, Nov 2015]

CRAT Gene

carnitine O-acetyltransferase

This gene encodes carnitine O-acetyltransferase, a member of the carnitine acyltransferase family and a key metabolic pathway enzyme which plays an important role in energy homeostasis and fat metabolism. This enzyme catalyzes the reversible transfer of acyl groups from an acyl-CoA thioester to carnitine and regulates the ratio of acyl-CoA/CoA. It is found in both the mitochondria and the peroxisome. Alternative splicing results in transcript variants encoding different isoforms that may localize to different subcellular compartments. [provided by RefSeq, Oct 2016]

GCATP1 Gene

glycine C-acetyltransferase pseudogene 1

GCAT Gene

glycine C-acetyltransferase

The degradation of L-threonine to glycine consists of a two-step biochemical pathway involving the enzymes L-threonine dehydrogenase and 2-amino-3-ketobutyrate coenzyme A ligase. L-Threonine is first converted into 2-amino-3-ketobutyrate by L-threonine dehydrogenase. This gene encodes the second enzyme in this pathway, which then catalyzes the reaction between 2-amino-3-ketobutyrate and coenzyme A to form glycine and acetyl-CoA. The encoded enzyme is considered a class II pyridoxal-phosphate-dependent aminotransferase. Alternate splicing results in multiple transcript variants. A pseudogene of this gene is found on chromosome 14. [provided by RefSeq, Jan 2010]

SAT1 Gene

spermidine/spermine N1-acetyltransferase 1

The protein encoded by this gene belongs to the acetyltransferase family, and is a rate-limiting enzyme in the catabolic pathway of polyamine metabolism. It catalyzes the acetylation of spermidine and spermine, and is involved in the regulation of the intracellular concentration of polyamines and their transport out of cells. Defects in this gene are associated with keratosis follicularis spinulosa decalvans (KFSD). Alternatively spliced transcripts have been found for this gene.[provided by RefSeq, Sep 2009]

SAT2 Gene

spermidine/spermine N1-acetyltransferase family member 2

Enables diamine N-acetyltransferase activity and identical protein binding activity. Involved in polyamine metabolic process. Located in extracellular exosome. [provided by Alliance of Genome Resources, Mar 2025]

NAA38 Gene

N(alpha)-acetyltransferase 38, NatC auxiliary subunit

Predicted to enable RNA binding activity. Involved in negative regulation of apoptotic process. Located in cytoplasm and nucleoplasm. Part of NatC complex. [provided by Alliance of Genome Resources, Mar 2025]

NAA35 Gene

N(alpha)-acetyltransferase 35, NatC auxiliary subunit

Predicted to enable transferase activity. Involved in negative regulation of apoptotic process. Located in cytosol; nucleoplasm; and plasma membrane. Part of NatC complex. [provided by Alliance of Genome Resources, Mar 2025]

NAA30 Gene

N(alpha)-acetyltransferase 30, NatC catalytic subunit

Enables peptide alpha-N-acetyltransferase activity. Involved in protein stabilization. Located in cytosol and nucleus. Part of NatC complex. [provided by Alliance of Genome Resources, Mar 2025]

LOC101928903 Gene

N-alpha-acetyltransferase 20 pseudogene

KAT6B Gene

K(lysine) acetyltransferase 6B

The protein encoded by this gene is a histone acetyltransferase and component of the MOZ/MORF protein complex. In addition to its acetyltransferase activity, the encoded protein has transcriptional activation activity in its N-terminal end and transcriptional repression activity in its C-terminal end. This protein is necessary for RUNX2-dependent transcriptional activation and could be involved in brain development. Mutations have been found in patients with genitopatellar syndrome. A translocation of this gene and the CREBBP gene results in acute myeloid leukemias. Three transcript variants encoding different isoforms have been found for this gene. [provided by RefSeq, Mar 2012]

KAT6A Gene

K(lysine) acetyltransferase 6A

This gene encodes a member of the MOZ, YBFR2, SAS2, TIP60 family of histone acetyltransferases. The protein is composed of a nuclear localization domain, a double C2H2 zinc finger domain that binds to acetylated histone tails, a histone acetyl-transferase domain, a glutamate/aspartate-rich region, and a serine- and methionine-rich transactivation domain. It is part of a complex that acetylates lysine-9 residues in histone 3, and in addition, it acts as a co-activator for several transcription factors. Allelic variants of this gene are associated with an autosomal dominant form of cognitive disability. Chromosomal translocations of this gene are associated with acute myeloid leukemia. Alternative splicing results in multiple transcript variants. [provided by RefSeq, Jul 2017]

LOC100133147 Gene

glucosamine-phosphate N-acetyltransferase 1 pseudogene

NAT8B Gene

N-acetyltransferase 8B (GCN5-related, putative, gene/pseudogene)

This gene is highly similar to the N-acetyltransferase 8 (NAT8) gene which encodes a kidney and liver protein with homology to bacterial acetyltransferases involved in drug resistance. This gene is localized on chromosome 2 in the vicinity of the NAT8 gene and represents a human-specific transcribed pseudogene of NAT8. This gene contains two common polymorphic nonsense mutations that disrupt the active site of the protein. In the extremely rare event when both nonsense mutations are absent, the predicted protein would contain a complete acetyltransferase domain and would be identical in length to NAT8. [provided by RefSeq, Apr 2022]

ESCO2 Gene

establishment of sister chromatid cohesion N-acetyltransferase 2

This gene encodes a protein that may have acetyltransferase activity and may be required for the establishment of sister chromatid cohesion during the S phase of mitosis. Mutations in this gene have been associated with Roberts syndrome. [provided by RefSeq, Jul 2008]

LOC100421444 Gene

glucosamine-phosphate N-acetyltransferase 1 pseudogene

AANAT Gene

aralkylamine N-acetyltransferase

The protein encoded by this gene belongs to the acetyltransferase superfamily. It is the penultimate enzyme in melatonin synthesis and controls the night/day rhythm in melatonin production in the vertebrate pineal gland. Melatonin is essential for the function of the circadian clock that influences activity and sleep. This enzyme is regulated by cAMP-dependent phosphorylation that promotes its interaction with 14-3-3 proteins and thus protects the enzyme against proteasomal degradation. This gene may contribute to numerous genetic diseases such as delayed sleep phase syndrome. Alternatively spliced transcript variants encoding different isoforms have been found for this gene. [provided by RefSeq, Oct 2009]

HAT1 Gene

histone acetyltransferase 1

The protein encoded by this gene is a type B histone acetyltransferase (HAT) that is involved in the rapid acetylation of newly synthesized cytoplasmic histones, which are in turn imported into the nucleus for de novo deposition onto nascent DNA chains. Histone acetylation, particularly of histone H4, plays an important role in replication-dependent chromatin assembly. Specifically, this HAT can acetylate soluble but not nucleosomal histone H4 at lysines 5 and 12, and to a lesser degree, histone H2A at lysine 5. Alternatively spliced transcript variants have been identified for this gene. [provided by RefSeq, Jun 2009]

ELP1 Gene

elongator acetyltransferase complex subunit 1

The protein encoded by this gene is a scaffold protein and a regulator for three different kinases involved in proinflammatory signaling. The encoded protein can bind NF-kappa-B-inducing kinase and I-kappa-B kinases through separate domains and assemble them into an active kinase complex. Mutations in this gene have been associated with familial dysautonomia. Alternative splicing results in multiple transcript variants encoding different isoforms. [provided by RefSeq, Jan 2016]

NAA80 Gene

N-alpha-acetyltransferase 80, NatH catalytic subunit

This gene encodes a member of the N-acetyltransferase family. N-acetyltransferases modify proteins by transferring acetyl groups from acetyl CoA to the N-termini of protein substrates. The encoded protein is a cytoplasmic N-acetyltransferase with a substrate specificity for proteins with an N-terminal methionine. This gene is located in the tumor suppressor gene region on chromosome 3p21.3 and the encoded protein may play a role in cancer. Alternatively spliced transcript variants encoding multiple isoforms have been observed. This gene overlaps and is on the same strand as hyaluronoglucosaminidase 3, and some transcripts of each gene share a portion of the first exon. [provided by RefSeq, Jan 2011]

KAT14 Gene

lysine acetyltransferase 14

CSRP2 is a protein containing two LIM domains, which are double zinc finger motifs found in proteins of diverse function. CSRP2 and some related proteins are thought to act as protein adapters, bridging two or more proteins to form a larger protein complex. The protein encoded by this gene binds to one of the LIM domains of CSRP2 and contains an acetyltransferase domain. Although the encoded protein has been detected in the cytoplasm, it is predominantly a nuclear protein. Alternatively spliced transcript variants have been described. [provided by RefSeq, Jun 2011]

ASPNAT Gene

aspartate N-acetyltransferase

This gene encodes a single-pass membrane protein, which contains a conserved sequence of the GCN5 or NAT superfamily of N-acetyltransferases and is a member of the N-acyltransferase (NAT) superfamily. This protein is a neuron-specific protein and is the N-acetylaspartate (NAA) biosynthetic enzyme, catalyzing the NAA synthesis from L-aspartate and acetyl-CoA. NAA is a major storage and transport form of acetyl coenzyme A specific to the nervous system. The gene mutation results in primary NAA deficiency (hypoacetylaspartia). [provided by RefSeq, Dec 2010]