2KLK

Solution structure of GB1 A34F mutant with RDC and SAXS

2KLK の概要

• エントリーDOI: 10.2210/pdb2klk/pdb
• 関連するPDBエントリー: 2RMM
• 分子名称: IMMUNOGLOBULIN G-BINDING PROTEIN G (1 entity in total)
• 機能のキーワード: gb1 a34f variant, rdc, saxs, protein binding, immune system
• 由来する生物種: Staphylococcus aureus
• タンパク質・核酸の鎖数: 2
• 化学式量合計: 12609.81

構造登録者

Wang, J.,Zuo, X.,Yu, P.,Byeon, I.L.,Jung, J.,Schwieters, C.D.,Gronenborn, A.M.,Wang, Y. (登録日: 2009-07-06, 公開日: 2009-10-06, 最終更新日: 2024-05-22)

主引用文献

Wang, J.,Zuo, X.,Yu, P.,Byeon, I.J.,Jung, J.,Wang, X.,Dyba, M.,Seifert, S.,Schwieters, C.D.,Qin, J.,Gronenborn, A.M.,Wang, Y.X.
Determination of multicomponent protein structures in solution using global orientation and shape restraints.
J.Am.Chem.Soc., 131:10507-10515, 2009

PubMed Abstract: Determining architectures of multicomponent proteins or protein complexes in solution is a challenging problem. Here we report a methodology that simultaneously uses residual dipolar couplings (RDC) and the small-angle X-ray scattering (SAXS) restraints to mutually orient subunits and define the global shape of multicomponent proteins and protein complexes. Our methodology is implemented in an efficient algorithm and demonstrated using five examples. First, we demonstrate the general approach with simulated data for the HIV-1 protease, a globular homodimeric protein. Second, we use experimental data to determine the structures of the two-domain proteins L11 and gammaD-Crystallin, in which the linkers between the domains are relatively rigid. Finally, complexes with K(d) values in the high micro- to millimolar range (weakly associating proteins), such as a homodimeric GB1 variant, and with K(d) values in the nanomolar range (tightly bound), such as the heterodimeric complex of the ILK ankyrin repeat domain (ARD) and PINCH LIM1 domain, respectively, are evaluated. Furthermore, the proteins or protein complexes that were determined using this method exhibit better solution structures than those obtained by either NMR or X-ray crystallography alone as judged based on the pair-distance distribution functions (PDDF) calculated from experimental SAXS data and back-calculated from the structures.

PubMed: 19722627
DOI: 10.1021/ja902528f

実験手法

SOLUTION NMR
SOLUTION SCATTERING