Biotechnology and Biological Sciences Research Council
BB/J005029/1
英国
引用
ジャーナル: Nat Commun / 年: 2015 タイトル: Cooperative folding of intrinsically disordered domains drives assembly of a strong elongated protein. 著者: Dominika T Gruszka / Fiona Whelan / Oliver E Farrance / Herman K H Fung / Emanuele Paci / Cy M Jeffries / Dmitri I Svergun / Clair Baldock / Christoph G Baumann / David J Brockwell / Jennifer ...著者: Dominika T Gruszka / Fiona Whelan / Oliver E Farrance / Herman K H Fung / Emanuele Paci / Cy M Jeffries / Dmitri I Svergun / Clair Baldock / Christoph G Baumann / David J Brockwell / Jennifer R Potts / Jane Clarke / 要旨: Bacteria exploit surface proteins to adhere to other bacteria, surfaces and host cells. Such proteins need to project away from the bacterial surface and resist significant mechanical forces. SasG is ...Bacteria exploit surface proteins to adhere to other bacteria, surfaces and host cells. Such proteins need to project away from the bacterial surface and resist significant mechanical forces. SasG is a protein that forms extended fibrils on the surface of Staphylococcus aureus and promotes host adherence and biofilm formation. Here we show that although monomeric and lacking covalent cross-links, SasG maintains a highly extended conformation in solution. This extension is mediated through obligate folding cooperativity of the intrinsically disordered E domains that couple non-adjacent G5 domains thermodynamically, forming interfaces that are more stable than the domains themselves. Thus, counterintuitively, the elongation of the protein appears to be dependent on the inherent instability of its domains. The remarkable mechanical strength of SasG arises from tandemly arrayed 'clamp' motifs within the folded domains. Our findings reveal an elegant minimal solution for the assembly of monomeric mechano-resistant tethers of variable length.
解像度: 1.6→59.79 Å / Cor.coef. Fo:Fc: 0.957 / Cor.coef. Fo:Fc free: 0.934 / WRfactor Rfree: 0.2664 / WRfactor Rwork: 0.2244 / FOM work R set: 0.8058 / SU B: 4.482 / SU ML: 0.081 / SU R Cruickshank DPI: 0.1043 / SU Rfree: 0.1068 / 交差検証法: FREE R-VALUE / σ(F): 0 / ESU R: 0.104 / ESU R Free: 0.107 / 立体化学のターゲット値: MAXIMUM LIKELIHOOD 詳細: HYDROGENS HAVE BEEN ADDED IN THE RIDING POSITIONS U VALUES : WITH TLS ADDED
Rfactor
反射数
%反射
Selection details
Rfree
0.249
2694
5 %
RANDOM
Rwork
0.2071
50959
-
-
obs
0.2093
50959
98.47 %
-
溶媒の処理
イオンプローブ半径: 0.8 Å / 減衰半径: 0.8 Å / VDWプローブ半径: 1.2 Å / 溶媒モデル: MASK