5MH2

Crystal structure of a DM9 domain containing protein from Crassostrea gigas with D22A mutation

5MH2 の概要

• エントリーDOI: 10.2210/pdb5mh2/pdb
• 分子名称: Natterin-3, CHLORIDE ION, GLYCEROL, ... (4 entities in total)
• 機能のキーワード: beta fold, sugar binding protein
• 由来する生物種: Crassostrea gigas (Pacific oyster)
• タンパク質・核酸の鎖数: 4
• 化学式量合計: 62133.75

構造登録者

Weinert, T.,Warkentin, E.,Peng, G. (登録日: 2016-11-22, 公開日: 2017-12-27, 最終更新日: 2024-01-17)

主引用文献

Jiang, S.,Wang, L.,Huang, M.,Jia, Z.,Weinert, T.,Warkentin, E.,Liu, C.,Song, X.,Zhang, H.,Witt, J.,Qiu, L.,Peng, G.,Song, L.
DM9 Domain Containing Protein Functions As a Pattern Recognition Receptor with Broad Microbial Recognition Spectrum.
Front Immunol, 8:1607-1607, 2017

PubMed Abstract: DM9 domain was first identified in , and it was subsequently found to integrate with or without other protein domains across a wide range of invertebrates and vertebrates. In the present study, a member of DM9 domain containing protein (DM9CP) family from marine invertebrate (designated CgDM9CP-1), which was only composed of two DM9 domains, was taken as a protein model to study the biological functions of DM9 domain and its molecular determinants. CgDM9CP-1 was found to exhibit high binding specificity and avidity toward d-mannose residue. It served as a pattern recognition receptor (PRR) with a broad range of recognition spectrum to various pathogen-associated molecular patterns, including lipopolysaccharide, peptidylglycan, mannan, and β-1, 3-glucan in a d-mannose-dependent manner, as well as bacteria and fungi. In order to reveal the molecular mechanism underlying its pattern recognition activity, the crystal structures of wild-type and loss-of-function mutants were solved, and Asp22 and Lys43 were found to be the critical residues for ligand recognition. Moreover, CgDM9CP-1 protein was found to mainly distribute on the surface of hemocytes, and it could be translocated into cytoplasm and colocalized with the engulfed microbes during hemocyte phagocytosis. The present result clearly indicated that CgDM9CP-1 was a PRR, and it provided an important clue for the better understanding of DM9CP function.

PubMed: 29238341
DOI: 10.3389/fimmu.2017.01607

実験手法

X-RAY DIFFRACTION (1.3 Å)