{"type": "root", "children": [{"type": "p", "children": [{"type": "t", "text": "\n Two complementary studies have recently advanced our understanding of human protein networks and the proteome. One study used an organelle‐targeted, affinity proteomics approach to map the intricate network of ciliary proteins. By tagging 217 human ciliary proteins, the investigators constructed a high‐resolution network of more than 1,300 proteins and nearly 5,000 interactions that link vesicle transport, cytoskeletal dynamics, signaling, and ubiquitination to ciliary function. Their work not only revealed new sub‐complexes within well‐known assemblies such as the exocyst and intraflagellar transport complexes but also implicated ciliary defects in genetic disorders, including 3M syndrome (1)."}]}, {"type": "t", "text": "\n \n "}, {"type": "p", "children": [{"type": "t", "text": "\n In parallel, the Chromosome‐centric Human Proteome Project (C-HPP) has made strides in identifying “missing proteins” encoded on chromosome 17. Using a blend of mass spectrometry, protein–protein interaction data, and in silico peptide capture, the team validated 43 new proteins and prioritized additional candidates. Notably, among these newly confirmed proteins were five keratin-associated proteins, one of which is KRTAP9-7. As a member of the keratin-associated protein family, KRTAP9-7 is presumed to contribute to the formation and mechanical resilience of keratin-based structures, such as those found in hair fibers. The validation of KRTAP9-7 not only fills an important gap in the human proteome but also provides a basis for future studies aimed at dissecting its specific structural and potentially regulatory roles within the cell (2).\n "}]}, {"type": "t", "text": "\n \n "}, {"type": "p", "children": [{"type": "t", "text": "\n Together, these studies underscore the value of combining targeted proteomics with genetic and in silico analyses to unravel complex protein interactions and to identify previously undocumented proteins. By expanding our knowledge of organelle-specific functions and confirming members of key protein families like the keratin-associated proteins, these approaches open new avenues to understand both normal cellular architecture and the molecular basis of disease.\n "}]}, {"type": "t", "text": "\n \n "}, {"type": "p", "children": [{"type": "t", "text": "\n Citations:."}, {"type": "fg", "children": [{"type": "fg_f", "ref": "1"}]}, {"type": "t", "text": "\n "}]}, {"type": "rg", "children": [{"type": "r", "ref": 1, "children": [{"type": "t", "text": "Karsten Boldt, Jeroen van Reeuwijk, Qianhao Lu, et al. "}, {"type": "b", "children": [{"type": "t", "text": "An organelle-specific protein landscape identifies novel diseases and molecular mechanisms."}]}, {"type": "t", "text": " "}, {"type": "i", "children": [{"type": "t", "text": "Nat Commun (2016)"}]}, {"type": "t", "text": " DOI: "}, {"type": "a", "children": [{"type": "t", "text": "10.1038/ncomms11491"}], "href": "https://doi.org/10.1038/ncomms11491"}, {"type": "t", "text": " PMID: "}, {"type": "a", "children": [{"type": "t", "text": "27173435"}], "href": "https://pubmed.ncbi.nlm.nih.gov/27173435"}]}, {"type": "r", "ref": 2, "children": [{"type": "t", "text": "Omer Siddiqui, Hongjiu Zhang, Yuanfang Guan, et al. "}, {"type": "b", "children": [{"type": "t", "text": "Chromosome 17 Missing Proteins: Recent Progress and Future Directions as Part of the neXt-MP50 Challenge."}]}, {"type": "t", "text": " "}, {"type": "i", "children": [{"type": "t", "text": "J Proteome Res (2018)"}]}, {"type": "t", "text": " DOI: "}, {"type": "a", "children": [{"type": "t", "text": "10.1021/acs.jproteome.8b00442"}], "href": "https://doi.org/10.1021/acs.jproteome.8b00442"}, {"type": "t", "text": " PMID: "}, {"type": "a", "children": [{"type": "t", "text": "30280577"}], "href": "https://pubmed.ncbi.nlm.nih.gov/30280577"}]}]}]}