Macromolecule Content

• Total Structure Weight: 7.77 kDa 
• Atom Count: 546 
• Modelled Residue Count: 67 
• Deposited Residue Count: 67 
• Unique protein chains: 1

1AWX

SH3 DOMAIN FROM BRUTON'S TYROSINE KINASE, NMR, MINIMIZED AVERAGE STRUCTURE

• DOI: 10.2210/pdb1AWX/pdb

• Classification: TRANSFERASE
• Organism(s): Homo sapiens
• Expression System: Escherichia coli
• Mutation(s): No 


• Deposited: 1997-10-06 Released: 1998-04-08 
• Deposition Author(s): Hansson, H., Mattsson, P.T., Allard, P., Haapaniemi, P., Vihinen, M., Smith, C.I.E., Hard, T.

---

Experimental Data Snapshot

• Method: SOLUTION NMR
• Conformers Calculated: 50 
• Conformers Submitted: 1 
• Selection Criteria: MINIMIZED AVERAGE STRUCTURE BASED ON 42 LOWEST ENERGY STRUCTURES 

Literature

Solution structure of the SH3 domain from Bruton's tyrosine kinase.

Hansson, H., Mattsson, P.T., Allard, P., Haapaniemi, P., Vihinen, M., Smith, C.I., Hard, T.

(1998) Biochemistry 37: 2912-2924

• PubMed: 9485443 
• DOI: 10.1021/bi972409f
• Primary Citation of Related Structures:  
  1AWX, 1AWW


• PubMed Abstract: 
  

X-linked agammaglobulinemia (XLA) is a heritable immunodeficiency caused by mutations in the gene coding for Bruton's tyrosine kinase (Btk). Btk belongs to the Tec family of tyrosine kinases. Each member of the family contains five regions and mutations causing XLA have been isolated in all five regions. We have determined the solution structure of the Src homology 3 (SH3) domain of Btk using two- and three-dimensional nuclear magnetic resonance (NMR) spectroscopy on natural abundance and 15N-labeled protein material. The structure determination is complemented by investigation of backbone dynamics based on 15N NMR relaxation. The Btk SH3 forms a well-defined structure and shows the typical SH3 topology of two short antiparallel beta-sheets packed almost perpendicular to each other in a sandwich-like fold. The N- and C-termini are more flexible as are peptide fragments in the RT and n-Src loops. The studied Btk SH3 fragment adopts two slowly interconverting conformations with a relative concentration ratio of 7:1. The overall fold of the minor form is similar to that of the major form, as judged on the basis of observed NOE connectivities and small chemical shift differences. A tryptophan (W251) ring flip is the favored mechanism for interconversion, although other possibilities cannot be excluded. The side chain of Y223, which becomes autophosphorylated upon activation of Btk, is exposed within the potential SH3 ligand binding site. Finally, we compare the present Btk SH3 structure with other SH3 structures.

---

Organizational Affiliation: 

Center for Structural Biochemistry, Department of Biochemistry and Biotechnology, Royal Institute of Technology, Novum, S-141 57 Huddinge, Sweden.

Macromolecules

Entity ID: 1
Molecule	Chains	Sequence Length	Organism	Details	Image
BRUTON'S TYROSINE KINASE	A	67	Homo sapiens	Mutation(s): 0  Gene Names: BTK, AGMX1, ATK, BPK EC: 2.7.1.112 (PDB Primary Data), 2.7.10.2 (UniProt)
UniProt & NIH Common Fund Data Resources
Find proteins for Q06187 (Homo sapiens) Explore Q06187  Go to UniProtKB:  Q06187
PHAROS:  Q06187 GTEx:  ENSG00000010671

Experimental Data & Validation

Experimental Data

• Method: SOLUTION NMR
• Conformers Calculated: 50 
• Conformers Submitted: 1 
• Selection Criteria: MINIMIZED AVERAGE STRUCTURE BASED ON 42 LOWEST ENERGY STRUCTURES 
• OLDERADO: 1AWX Olderado

Structure Validation

Entry History 

Deposition Data

• Deposited Date: 1997-10-06 
• Released Date: 1998-04-08 
Deposition Author(s): Hansson, H., Mattsson, P.T., Allard, P., Haapaniemi, P., Vihinen, M., Smith, C.I.E., Hard, T.

Revision History  

• Version 1.0: 1998-04-08
  Type: Initial release
  
• Version 1.1: 2008-03-24
  Changes: Version format compliance
• Version 1.2: 2011-07-13
  Changes: Version format compliance