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2021 Fiscal Year Final Research Report

Structural changes of hetero-oligomers in the Protein Data Bank

Research Project

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Project/Area Number 18H03331
Research Category

Grant-in-Aid for Scientific Research (B)

Allocation TypeSingle-year Grants
Section一般
Review Section Basic Section 62010:Life, health and medical informatics-related
Research InstitutionNagoya University

Principal Investigator

Ota Motonori  名古屋大学, 情報学研究科, 教授 (40290895)

Project Period (FY) 2018-04-01 – 2022-03-31
Keywords立体構造 / 構造変化 / 構造機能相関
Outline of Final Research Achievements

Most of the protein hetero oligomers are the transient complexes and regulate physiological activities. Because protein structural change associates with its function, the study of the structural change is important to elucidate the molecular mechanism of protein function. In this study, we extracted the most plausible physiological structures of oligomers from the PDB. We compared structures of the identical hetero-dimers, analysed structural changes systematically and classified them using the protein families as the unit of statistics. To this purpose, we utilized two original applications. SCPS detected the binding mode of hetero-dimers and Motion Tree identified and illustrated structural changes. We found that the interface motions are rarer in the hetero-dimers than the homo-dimers.

Free Research Field

生命情報学

Academic Significance and Societal Importance of the Research Achievements

タンパク質は複合体構造をとって働くものが多い.またタンパク質の働きには構造変化が関与する.以上のことから複合体の構造変化研究は生命の成り立ちや疾病への対処を考える際に必須である.構造決定されたタンパク質の立体構造はPDBに登録されているが,そこから生状態の構造を選択することは難しい.本研究ではまず,膨大なPDBデータから尤もらしい生状態構造を取得する方法を確立した.次にヘテロダイマーに対象を絞り,構造変化を大規模に解析し,インターフェースを利用した運動が少ないことを発見した.生理活性の調節に関与するヘテロマーの運動について知見が得られたことは,その機能発現メカニズム解明の端緒となる.

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Published: 2023-01-30  

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