1cee

Structural highlights

Disease

[WASP_HUMAN] Defects in WAS are the cause of Wiskott-Aldrich syndrome (WAS) [MIM:301000]; also known as eczema-thrombocytopenia-immunodeficiency syndrome. WAS is an X-linked recessive immunodeficiency characterized by eczema, thrombocytopenia, recurrent infections, and bloody diarrhea. Death usually occurs before age 10.^{[1] [2] [3] [4] [5] [6] [7] [8] [9] [10] [11]} Defects in WAS are the cause of thrombocytopenia type 1 (THC1) [MIM:313900]. Thrombocytopenia is defined by a decrease in the number of platelets in circulating blood, resulting in the potential for increased bleeding and decreased ability for clotting.^{[12] [13] [14] [15] [16]} Defects in WAS are a cause of neutropenia severe congenital X-linked (XLN) [MIM:300299]. XLN is an immunodeficiency syndrome characterized by recurrent major bacterial infections, severe congenital neutropenia, and monocytopenia.^[17]

Function

[CDC42_HUMAN] Plasma membrane-associated small GTPase which cycles between an active GTP-bound and an inactive GDP-bound state. In active state binds to a variety of effector proteins to regulate cellular responses. Involved in epithelial cell polarization processes. Regulates the bipolar attachment of spindle microtubules to kinetochores before chromosome congression in metaphase. Plays a role in the extension and maintenance of the formation of thin, actin-rich surface projections called filopodia. Mediates CDC42-dependent cell migration.^{[18] [19] [20]} [WASP_HUMAN] Effector protein for Rho-type GTPases. Regulates actin filament reorganization via its interaction with the Arp2/3 complex. Important for efficient actin polymerization. Possible regulator of lymphocyte and platelet function. Mediates actin filament reorganization and the formation of actin pedestals upon infection by pathogenic bacteria.^{[21] [22] [23]}

Evolutionary Conservation

Check, as determined by ConSurfDB. You may read the explanation of the method and the full data available from ConSurf.

See Also

• GTP-binding protein 3D structures
• Wiskott-Aldrich syndrome protein

References

1. ↑ Kwan SP, Hagemann TL, Radtke BE, Blaese RM, Rosen FS. Identification of mutations in the Wiskott-Aldrich syndrome gene and characterization of a polymorphic dinucleotide repeat at DXS6940, adjacent to the disease gene. Proc Natl Acad Sci U S A. 1995 May 9;92(10):4706-10. PMID:7753869
2. ↑ Kolluri R, Shehabeldin A, Peacocke M, Lamhonwah AM, Teichert-Kuliszewska K, Weissman SM, Siminovitch KA. Identification of WASP mutations in patients with Wiskott-Aldrich syndrome and isolated thrombocytopenia reveals allelic heterogeneity at the WAS locus. Hum Mol Genet. 1995 Jul;4(7):1119-26. PMID:8528198
3. ↑ Derry JM, Kerns JA, Weinberg KI, Ochs HD, Volpini V, Estivill X, Walker AP, Francke U. WASP gene mutations in Wiskott-Aldrich syndrome and X-linked thrombocytopenia. Hum Mol Genet. 1995 Jul;4(7):1127-35. PMID:8528199
4. ↑ Schindelhauer D, Weiss M, Hellebrand H, Golla A, Hergersberg M, Seger R, Belohradsky BH, Meindl A. Wiskott-Aldrich syndrome: no strict genotype-phenotype correlations but clustering of missense mutations in the amino-terminal part of the WASP gene product. Hum Genet. 1996 Jul;98(1):68-76. PMID:8682510
5. ↑ Remold-O'Donnell E, Cooley J, Shcherbina A, Hagemann TL, Kwan SP, Kenney DM, Rosen FS. Variable expression of WASP in B cell lines of Wiskott-Aldrich syndrome patients. J Immunol. 1997 May 1;158(9):4021-5. PMID:9126958
6. ↑ Ariga T, Yamada M, Sakiyama Y. Mutation analysis of five Japanese families with Wiskott-Aldrich syndrome and determination of the family members' carrier status using three different methods. Pediatr Res. 1997 Apr;41(4 Pt 1):535-40. PMID:9098856 doi:10.1203/00006450-199704000-00013
7. ↑ MacCarthy-Morrogh L, Gaspar HB, Wang YC, Katz F, Thompson L, Layton M, Jones AM, Kinnon C. Absence of expression of the Wiskott-Aldrich syndrome protein in peripheral blood cells of Wiskott-Aldrich syndrome patients. Clin Immunol Immunopathol. 1998 Jul;88(1):22-7. PMID:9683546
8. ↑ Facchetti F, Blanzuoli L, Vermi W, Notarangelo LD, Giliani S, Fiorini M, Fasth A, Stewart DM, Nelson DL. Defective actin polymerization in EBV-transformed B-cell lines from patients with the Wiskott-Aldrich syndrome. J Pathol. 1998 May;185(1):99-107. PMID:9713366 doi:<99::AID-PATH48>3.0.CO;2-L 10.1002/(SICI)1096-9896(199805)185:1<99::AID-PATH48>3.0.CO;2-L
9. ↑ Parolini O, Ressmann G, Haas OA, Pawlowsky J, Gadner H, Knapp W, Holter W. X-linked Wiskott-Aldrich syndrome in a girl. N Engl J Med. 1998 Jan 29;338(5):291-5. PMID:9445409 doi:10.1056/NEJM199801293380504
10. ↑ Lemahieu V, Gastier JM, Francke U. Novel mutations in the Wiskott-Aldrich syndrome protein gene and their effects on transcriptional, translational, and clinical phenotypes. Hum Mutat. 1999;14(1):54-66. PMID:10447259 doi:<54::AID-HUMU7>3.0.CO;2-E 10.1002/(SICI)1098-1004(1999)14:1<54::AID-HUMU7>3.0.CO;2-E
11. ↑ El-Hakeh J, Rosenzweig S, Oleastro M, Basack N, Berozdnik L, Molina F, Rivas EM, Zelazko M, Danielian S. Wiskott-Aldrich syndrome in Argentina: 17 unique, including nine novel, mutations. Hum Mutat. 2002 Feb;19(2):186-7. PMID:11793485 doi:10.1002/humu.9013
12. ↑ Derry JM, Kerns JA, Weinberg KI, Ochs HD, Volpini V, Estivill X, Walker AP, Francke U. WASP gene mutations in Wiskott-Aldrich syndrome and X-linked thrombocytopenia. Hum Mol Genet. 1995 Jul;4(7):1127-35. PMID:8528199
13. ↑ Lemahieu V, Gastier JM, Francke U. Novel mutations in the Wiskott-Aldrich syndrome protein gene and their effects on transcriptional, translational, and clinical phenotypes. Hum Mutat. 1999;14(1):54-66. PMID:10447259 doi:<54::AID-HUMU7>3.0.CO;2-E 10.1002/(SICI)1098-1004(1999)14:1<54::AID-HUMU7>3.0.CO;2-E
14. ↑ Villa A, Notarangelo L, Macchi P, Mantuano E, Cavagni G, Brugnoni D, Strina D, Patrosso MC, Ramenghi U, Sacco MG, et al.. X-linked thrombocytopenia and Wiskott-Aldrich syndrome are allelic diseases with mutations in the WASP gene. Nat Genet. 1995 Apr;9(4):414-7. PMID:7795648 doi:http://dx.doi.org/10.1038/ng0495-414
15. ↑ Ho LL, Ayling J, Prosser I, Kronenberg H, Iland H, Joshua D. Missense C168T in the Wiskott--Aldrich Syndrome protein gene is a common mutation in X-linked thrombocytopenia. Br J Haematol. 2001 Jan;112(1):76-80. PMID:11167787
16. ↑ Notarangelo LD, Mazza C, Giliani S, D'Aria C, Gandellini F, Ravelli C, Locatelli MG, Nelson DL, Ochs HD, Notarangelo LD. Missense mutations of the WASP gene cause intermittent X-linked thrombocytopenia. Blood. 2002 Mar 15;99(6):2268-9. PMID:11877312
17. ↑ Devriendt K, Kim AS, Mathijs G, Frints SG, Schwartz M, Van Den Oord JJ, Verhoef GE, Boogaerts MA, Fryns JP, You D, Rosen MK, Vandenberghe P. Constitutively activating mutation in WASP causes X-linked severe congenital neutropenia. Nat Genet. 2001 Mar;27(3):313-7. PMID:11242115 doi:10.1038/85886
18. ↑ Gauthier-Campbell C, Bredt DS, Murphy TH, El-Husseini Ael-D. Regulation of dendritic branching and filopodia formation in hippocampal neurons by specific acylated protein motifs. Mol Biol Cell. 2004 May;15(5):2205-17. Epub 2004 Feb 20. PMID:14978216 doi:10.1091/mbc.E03-07-0493
19. ↑ Oceguera-Yanez F, Kimura K, Yasuda S, Higashida C, Kitamura T, Hiraoka Y, Haraguchi T, Narumiya S. Ect2 and MgcRacGAP regulate the activation and function of Cdc42 in mitosis. J Cell Biol. 2005 Jan 17;168(2):221-32. Epub 2005 Jan 10. PMID:15642749 doi:10.1083/jcb.200408085
20. ↑ Modzelewska K, Newman LP, Desai R, Keely PJ. Ack1 mediates Cdc42-dependent cell migration and signaling to p130Cas. J Biol Chem. 2006 Dec 8;281(49):37527-35. Epub 2006 Oct 12. PMID:17038317 doi:10.1074/jbc.M604342200
21. ↑ Cory GO, Garg R, Cramer R, Ridley AJ. Phosphorylation of tyrosine 291 enhances the ability of WASp to stimulate actin polymerization and filopodium formation. Wiskott-Aldrich Syndrome protein. J Biol Chem. 2002 Nov 22;277(47):45115-21. Epub 2002 Sep 15. PMID:12235133 doi:10.1074/jbc.M203346200
22. ↑ Chereau D, Kerff F, Graceffa P, Grabarek Z, Langsetmo K, Dominguez R. Actin-bound structures of Wiskott-Aldrich syndrome protein (WASP)-homology domain 2 and the implications for filament assembly. Proc Natl Acad Sci U S A. 2005 Nov 15;102(46):16644-9. Epub 2005 Nov 7. PMID:16275905
23. ↑ Cheng HC, Skehan BM, Campellone KG, Leong JM, Rosen MK. Structural mechanism of WASP activation by the enterohaemorrhagic E. coli effector EspF(U). Nature. 2008 Aug 21;454(7207):1009-13. Epub 2008 Jul 23. PMID:18650809 doi:10.1038/nature07160
24. ↑ Abdul-Manan N, Aghazadeh B, Liu GA, Majumdar A, Ouerfelli O, Siminovitch KA, Rosen MK. Structure of Cdc42 in complex with the GTPase-binding domain of the 'Wiskott-Aldrich syndrome' protein. Nature. 1999 May 27;399(6734):379-83. PMID:10360578 doi:10.1038/20726