7VU2

Chitoporin from Serratia marcescens

7VU2 の概要

• エントリーDOI: 10.2210/pdb7vu2/pdb
• 関連するPDBエントリー: 7VTZ
• 分子名称: Chitoporin, 2-(N-MORPHOLINO)-ETHANESULFONIC ACID, CALCIUM ION, ... (5 entities in total)
• 機能のキーワード: outer membrane protein chitoporin specific porin, membrane protein
• 由来する生物種: Serratia marcescens
• タンパク質・核酸の鎖数: 1
• 化学式量合計: 55449.05

構造登録者

Amornloetwattana, R.,Robinson, R.C.,van den Berg, B.,Suginta, W. (登録日: 2021-11-01, 公開日: 2022-11-09, 最終更新日: 2025-01-29)

主引用文献

Amornloetwattana, R.,Robinson, R.C.,Soysa, H.S.M.,van den Berg, B.,Suginta, W.
Chitoporin from Serratia marcescens: recombinant expression, purification and crystallization.
Acta Crystallogr.,Sect.F, 76:536-543, 2020

PubMed Abstract: Serratia marcescens is an opportunistic pathogen that commonly causes hospital-acquired infections and can utilize chitin-enriched nutrients as an alternative energy source. This study reports the identification of a chitoporin (ChiP), termed SmChiP, from the outer membrane of S. marcescens. Sequence alignment with genetically characterized ChiPs suggests that SmChiP is more closely related to the monomeric EcChiP from Escherichia coli than to the trimeric VhChiP from Vibrio campbellii. A single crystal of SmChiP grown under the condition 22%(w/v) PEG 8000, 0.1 M calcium acetate, 0.1 M MES pH 6.0 diffracted X-ray synchrotron radiation to 1.85 Å resolution. SmChiP co-crystallized with chitohexaose under the condition 19%(w/v) PEG 1500, 2 M ammonium phosphate monobasic, 0.1 M HEPES pH 7.0 diffracted X-rays to 2.70 Å resolution. Preliminary crystallographic analysis shows that both SmChiP crystal forms contain one molecule per asymmetric unit and that they belong to the tetragonal space groups P422 and P422, respectively. The SmChiP crystal has unit-cell parameters a = 82.97, b = 82.97, c = 189.53 Å, α = β = γ = 90°, while the crystal of SmChiP in complex with chitohexaose has unit-cell parameters a = 73.24, b = 73.24, c = 213.46 Å, α = β = γ = 90°. Initial assessment of the complex structure clearly revealed electron density for the sugar ligand. Structure determination of SmChiP in the absence and presence of chitohexaose should reveal the molecular basis of chitin utilization by S. marcescens.

PubMed: 33135672
DOI: 10.1107/S2053230X20013874

実験手法

X-RAY DIFFRACTION (1.85 Å)