6GPM

Crystal structure of domain 2 from TmArgBP

6GPM の概要

• エントリーDOI: 10.2210/pdb6gpm/pdb
• 分子名称: Amino acid ABC transporter, periplasmic amino acid-binding protein (2 entities in total)
• 機能のキーワード: domain-domain communication, diagnostic tool, protein dissection, biosensor, protein structure-stability, transport protein
• 由来する生物種: Thermotoga maritima
• タンパク質・核酸の鎖数: 1
• 化学式量合計: 9976.36

構造登録者

Smaldone, G.,Balasco, N.,Ruggiero, A.,Berisio, R.,Vitagliano, L. (登録日: 2018-06-06, 公開日: 2018-08-15, 最終更新日: 2024-01-17)

主引用文献

Smaldone, G.,Balasco, N.,Vigorita, M.,Ruggiero, A.,Cozzolino, S.,Berisio, R.,Del Vecchio, P.,Graziano, G.,Vitagliano, L.
Domain communication in Thermotoga maritima Arginine Binding Protein unraveled through protein dissection.
Int. J. Biol. Macromol., 119:758-769, 2018

PubMed Abstract: Substrate binding proteins represent a large protein family that plays fundamental roles in selective transportation of metabolites across membrane. The function of these proteins relies on the relative motions of their two domains. Insights into domain communication in this class of proteins have been here collected using Thermotoga maritima Arginine Binding Protein (TmArgBP) as model system. TmArgBP was dissected into two domains (D1 and D2) that were exhaustively characterized using a repertoire of different experimental and computational techniques. Indeed, stability, crystalline structure, ability to recognize the arginine substrate, and dynamics of the two individual domains have been here studied. Present data demonstrate that, although in the parent protein both D1 and D2 cooperate for the arginine anchoring; only D1 is intrinsically able to bind the substrate. The implications of this finding on the mechanism of arginine binding and release by TmArgBP have been discussed. Interestingly, both D1 and D2 retain the remarkable thermal/chemical stability of the parent protein. The analysis of the structural and dynamic properties of TmArgBP and of the individual domains highlights possible routes of domain communication. Finally, this study generated two interesting molecular tools, the two stable isolated domains that could be used in future investigations.

PubMed: 30059738
DOI: 10.1016/j.ijbiomac.2018.07.172

実験手法

X-RAY DIFFRACTION (1.73 Å)