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Glycoprotein IX

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Title: Glycoprotein IX  
Author: World Heritage Encyclopedia
Language: English
Subject: Glycoprotein Ib, Platelet membrane glycoprotein, GP1BA, ITGA2B, GP1BB
Collection: Clusters of Differentiation
Publisher: World Heritage Encyclopedia

Glycoprotein IX

Glycoprotein IX (platelet)
Available structures
PDB Ortholog search: PDBe, RCSB
Symbols  ; CD42a; GPIX
External IDs GeneCards:
RNA expression pattern
Species Human Mouse
RefSeq (mRNA)
RefSeq (protein)
Location (UCSC)
PubMed search

Glycoprotein IX (platelet) (GP9) also known as CD42a (Cluster of Differentiation 42a), is a human gene.[1] Platelet glycoprotein IX (GP9) is a small membrane glycoprotein found on the surface of human platelets. It forms a 1-to-1 noncovalent complex with glycoprotein Ib (GP Ib), a platelet surface membrane glycoprotein complex that functions as a receptor for von Willebrand factor (VWF; MIM 193400) (known as the Glycoprotein Ib-IX-V Receptor Complex). The main portion of the receptor is a heterodimer composed of 2 polypeptide chains, an alpha chain (GP1BA; MIM 606672) and a beta chain (GP1BB; MIM 138720), that are linked by disulfide bonds. The complete receptor complex includes noncovalent association of the alpha and beta subunits with GP9 and platelet glycoprotein V (GP5; MIM 173511).[supplied by OMIM][1]


  • See also 1
  • References 2
  • Further reading 3
  • External links 4

See also


  1. ^ a b "Entrez Gene: GP9 glycoprotein IX (platelet)". 

Further reading

  • Kunishima S, Kamiya T, Saito H (2003). "Genetic abnormalities of Bernard-Soulier syndrome". Int. J. Hematol. 76 (4): 319–27.  
  • Hickey MJ, Deaven LL, Roth GJ (1991). "Human platelet glycoprotein IX. Characterization of cDNA and localization of the gene to chromosome 3". FEBS Lett. 274 (1–2): 189–92.  
  • Du X, Beutler L, Ruan C, et al. (1987). "Glycoprotein Ib and glycoprotein IX are fully complexed in the intact platelet membrane". Blood 69 (5): 1524–7.  
  • Andrews RK, Booth WJ, Gorman JJ, et al. (1990). "Purification of botrocetin from Bothrops jararaca venom. Analysis of the botrocetin-mediated interaction between von Willebrand factor and the human platelet membrane glycoprotein Ib-IX complex". Biochemistry 28 (21): 8317–26.  
  • Hickey MJ, Williams SA, Roth GJ (1989). "Human platelet glycoprotein IX: an adhesive prototype of leucine-rich glycoproteins with flank-center-flank structures". Proc. Natl. Acad. Sci. U.S.A. 86 (17): 6773–7.  
  • Roth GJ, Ozols J, Nugent DJ, Williams SA (1988). "Isolation and characterization of human platelet glycoprotein IX". Biochem. Biophys. Res. Commun. 156 (2): 931–9.  
  • Meyer SC, Fox JE (1995). "Interaction of platelet glycoprotein V with glycoprotein Ib-IX regulates expression of the glycoproteins and binding of von Willebrand factor to glycoprotein Ib-IX in transfected cells". J. Biol. Chem. 270 (24): 14693–9.  
  • Clemetson JM, Kyrle PA, Brenner B, Clemetson KJ (1994). "Variant Bernard-Soulier syndrome associated with a homozygous mutation in the leucine-rich domain of glycoprotein IX". Blood 84 (4): 1124–31.  
  • Hickey MJ, Roth GJ (1993). "Characterization of the gene encoding human platelet glycoprotein IX". J. Biol. Chem. 268 (5): 3438–43.  
  • Wright SD, Michaelides K, Johnson DJ, et al. (1993). "Double heterozygosity for mutations in the platelet glycoprotein IX gene in three siblings with Bernard-Soulier syndrome". Blood 81 (9): 2339–47.  
  • Berger G, Massé JM, Cramer EM (1996). "Alpha-granule membrane mirrors the platelet plasma membrane and contains the glycoproteins Ib, IX, and V". Blood 87 (4): 1385–95.  
  • Hollmann C, Haag F, Schlott M, et al. (1996). "Molecular characterization of mouse T-cell ecto-ADP-ribosyltransferase Rt6: cloning of a second functional gene and identification of the Rt6 gene products". Mol. Immunol. 33 (9): 807–17.  
  • Noris P, Simsek S, Stibbe J, von dem Borne AE (1997). "A phenylalanine-55 to serine amino-acid substitution in the human glycoprotein IX leucine-rich repeat is associated with Bernard-Soulier syndrome". Br. J. Haematol. 97 (2): 312–20.  
  • Hayashi T, Suzuki K, Yahagi A, et al. (1997). "Corrected DNA sequence of the platelet glycoprotein IX gene". Thromb. Haemost. 77 (5): 1034–5.  
  • Bradford HN, Dela Cadena RA, Kunapuli SP, et al. (1997). "Human kininogens regulate thrombin binding to platelets through the glycoprotein Ib-IX-V complex". Blood 90 (4): 1508–15.  
  • Suzuki K, Hayashi T, Yahagi A, et al. (1998). "Novel point mutation in the leucine-rich motif of the platelet glycoprotein IX associated with Bernard-Soulier syndrome". Br. J. Haematol. 99 (4): 794–800.  
  • Noris P, Arbustini E, Spedini P, et al. (1999). "A new variant of Bernard-Soulier syndrome characterized by dysfunctional glycoprotein (GP) Ib and severely reduced amounts of GPIX and GPV". Br. J. Haematol. 103 (4): 1004–13.  
  • Longhurst CM, White MM, Wilkinson DA, Jennings LK (1999). "A CD9, alphaIIbbeta3, integrin-associated protein, and GPIb/V/IX complex on the surface of human platelets is influenced by alphaIIbbeta3 conformational states". Eur. J. Biochem. 263 (1): 104–11.  
  • Kunishima S, Tomiyama Y, Honda S, et al. (2000). "Cys97-->Tyr mutation in the glycoprotein IX gene associated with Bernard-Soulier syndrome". Br. J. Haematol. 107 (3): 539–45.  
  • Rivera CE, Villagra J, Riordan M, et al. (2001). "Identification of a new mutation in platelet glycoprotein IX (GPIX) in a patient with Bernard-Soulier syndrome". Br. J. Haematol. 112 (1): 105–8.  

External links

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