2wx0 | pdb_00002wx0
TAB2 NZF DOMAIN IN COMPLEX WITH LYS63-LINKED DI-UBIQUITIN, P21
Structural highlights
Disease[TAB2_HUMAN] Defects in TAB2 are the cause of congenital heart disease non-syndromic type 2 (CHTD2) [MIM:612863]. It is a disease characterized by congenital developmental abnormalities involving structures of the heart. Clinical features include left ventricular outflow tract obstruction, subaortic stenosis, residual aortic regurgitation, atrial fibrillation, bicuspid aortic valve and aortic dilation. Note=A chromosomal aberration involving TAB2 has been found in a family with congenital heart disease. Translocation t(2;6)(q21;q25).[1] Function[TAB2_HUMAN] Adapter linking MAP3K7/TAK1 and TRAF6. Promotes MAP3K7 activation in the IL1 signaling pathway. The binding of 'Lys-63'-linked polyubiquitin chains to TAB2 promotes autophosphorylation of MAP3K7 at 'Thr-187'. Involved in heart development.[2] [3] [4] Evolutionary Conservation Check, as determined by ConSurfDB. You may read the explanation of the method and the full data available from ConSurf. Publication Abstract from PubMedThe protein kinase TAK1 is activated by binding to Lys63 (K63)-linked ubiquitin chains through its subunit TAB2. Here we analyze crystal structures of the TAB2 NZF domain bound to Lys63-linked di- and triubiquitin, revealing that TAB2 binds adjacent ubiquitin moieties via two distinct binding sites. The conformational constraints imposed by TAB2 on a Lys63 dimer cannot be adopted by linear chains, explaining why TAK1 cannot be activated by linear ubiquitination events. Two-sided ubiquitin binding explains specificity of the TAB2 NZF domain.,Kulathu Y, Akutsu M, Bremm A, Hofmann K, Komander D Nat Struct Mol Biol. 2009 Dec;16(12):1328-30. Epub 2009 Nov 22. PMID:19935683[5] From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine. See AlsoReferences
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