3buw Summary

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Crystal structure of c-Cbl-TKB domain complexed with its binding motif in Syk

The structure was published by Ng, C., Jackson, R.A., Buschdorf, J.P., Sun, Q., Guy, G.R., and Sivaraman, J., in 2008 in a paper entitled "Structural basis for a novel intrapeptidyl H-bond and reverse binding of c-Cbl-TKB domain substrates" (abstract).

This crystal structure was determined using X-ray diffraction at a resolution of 1.45 Å and deposited in 2008.

The experimental data on which the structure is based was also deposited.

This PDB entry contains a complex of 2 biomacromolecules, namely 13-meric peptide from Tyrosine-protein kinase SYK and E3 ubiquitin-protein ligase CBL.

The molecule has more than one probable quaternary state observed. For more details see the quaternary structure page.

The following tables show cross-reference information to other databases (to obtain a list of all PDB entries sharing the same property or classification, click on the magnifying glass icon):


Chain Name UniProt Name of source organism % of UniProt sequence present in the sample Residues in the sample molecules % of residues observed
A 13-meric peptide from Tyrosine-protein kinase SYK P43405 (317-329) (KSYK_HUMAN)search Homo sapienssearch 100% 13 69%
C 13-meric peptide from Tyrosine-protein kinase SYK P43405 (317-329) (KSYK_HUMAN)search Homo sapienssearch 100% 13 69%
B E3 ubiquitin-protein ligase CBL P22681 (25-351) (CBL_HUMAN)search Homo sapienssearch < 90% 329 92%
D E3 ubiquitin-protein ligase CBL P22681 (25-351) (CBL_HUMAN)search Homo sapienssearch < 90% 329 92%


This entry contains 2 unique UniProt proteins:

UniProt accession Name Organism PDB
P43405 (317 - 329) 13-meric peptide from Tyrosine-protein kinase SYK
P22681 (25 - 351) E3 ubiquitin-protein ligase CBL Homo sapiens

Chain Structural classification (SCOP) Structural classification (CATH) Sequence family (Pfam)
A, C (P43405)
B, D EF-hand modules in multidomain proteinssearch, N-terminal domain of cbl (N-cbl)search, SH2 domainsearch Transcription Elongation Factor S-II; Chain Asearch, EF-handsearch, SHC Adaptor Proteinsearch CBL proto-oncogene N-terminal domain 1search, CBL proto-oncogene N-terminus, EF hand-like domainsearch, CBL proto-oncogene N-terminus, SH2-like domainsearch

Chain ID Molecular function (GO) Biological process (GO) Cellular component (GO)
B, D (P22681) phosphotyrosine bindingsearch signal transducer activitysearch calcium ion bindingsearch ubiquitin-protein transferase activitysearch regulation of signalingsearch cell surface receptor signaling pathwaysearch nucleussearch

Chain InterPro annotation
A, C
B, D SH2 domainsearch Adaptor protein Cbl, N-terminal helicalsearch EF-hand domain pairsearch Adaptor protein Cbl, EF hand-likesearch Adaptor protein Cbl, SH2-likesearch Adaptor protein Cbl, PTB domainsearch Adaptor protein Cblsearch