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Overview

Uniprot IDP13987
Protein NameCD59 glycoprotein
Gene NameCD59
OrganismHomo sapiens

Kla Sites from experimental identification

Position Flanking peptide
90 ELTYYCCKKDLCNFN
91 LTYYCCKKDLCNFNE

Function

Potent inhibitor of the complement membrane attack complex (MAC) action, which protects human cells from damage during complement activation (PubMed:11882685, PubMed:1698710, PubMed:2475111, PubMed:2475570, PubMed:2606909, PubMed:9053451). Acts by binding to the beta-haipins of C8 (C8A and C8B) components of the assembling MAC, forming an intermolecular beta-sheet that prevents incorporation of the multiple copies of C9 required for complete formation of the osmolytic pore (PubMed:11882685, PubMed:1698710, PubMed:36797260)

Protein Sequence

10 MGIQGGSVLF 20 GLLLVLAVFC 30 HSGHSLQCYN 40 CPNPTADCKT 50 AVNCSSDFDA 60 CLITKAGLQV 70 YNKCWKFEHC 80 NFNDVTTRLR 90 ENELTYYCCK 100 KDLCNFNEQL 110 ENGGTSLSEK 120 TVLLLVTPFL AAAWSLHP

Gene Ontology

Classification GO ID Description
Cellular Component GO:0009986 cell surface
Cellular Component GO:0005789 endoplasmic reticulum membrane
Cellular Component GO:0033116 endoplasmic reticulum-Golgi intermediate compartment membrane
Cellular Component GO:0012507 ER to Golgi transport vesicle membrane
Cellular Component GO:0009897 external side of plasma membrane
Cellular Component GO:0070062 extracellular exosome
Cellular Component GO:0005615 extracellular space
Cellular Component GO:0005925 focal adhesion
Cellular Component GO:0000139 Golgi membrane
Cellular Component GO:0016020 membrane
Cellular Component GO:0005886 plasma membrane
Cellular Component GO:0035579 specific granule membrane
Cellular Component GO:0070821 tertiary granule membrane
Cellular Component GO:0030133 transport vesicle
Cellular Component GO:0031982 vesicle
Molecular Function GO:0001848 complement binding
Molecular Function GO:0140311 protein sequestering activity
Biological Process GO:0007596 blood coagulation
Biological Process GO:0007166 cell surface receptor signaling pathway
Biological Process GO:0001971 negative regulation of activation of membrane attack complex
Biological Process GO:0045916 negative regulation of complement activation
Biological Process GO:1903660 negative regulation of complement-dependent cytotoxicity
Biological Process GO:0030449 regulation of complement activation
Biological Process GO:1903659 regulation of complement-dependent cytotoxicity

Reference

[1] Yang Z, Yan C, Ma J, Peng P, Ren X et al.. Lactylome analysis suggests lactylation-dependent mechanisms of metabolic adaptation in hepatocellular carcinoma.. Nat Metab 5(1):61-79. 2023 Jan. PMID: 36593272.

[2] Wu Q, Li Z, Gong T, Zheng X, Zhou X et al.. Porphyromonas gingivalis infection induces lysine lactylation reprogramming in human umbilical vein endothelial cells.. Front Cell Infect Microbiol 16:1706727. 2026. PMID: 41696360.