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Global mapping of the protein structure space and application in structure-based inference of protein function.

ABSTRACT: We have constructed a map of the "protein structure space" by using the pairwise structural similarity scores calculated for all nonredundant protein structures determined experimentally. As expected, proteins with similar structures clustered together in the map and the overall distribution of structural classes of this map followed closely that of the map of the "protein fold space" we have reported previously. Consequently, proteins sharing similar molecular functions also were found to colocalize in the protein structure space map, pointing toward a previously undescribed scheme for structure-based functional inference for remote homologues based on the proximity in the map of the protein structure space. We found that this scheme consistently outperformed other predictions made by using either the raw scores or normalized Z-scores of pairwise DALI structure alignment.

SUBMITTER: Hou J

PROVIDER: S-EPMC548596 | biostudies-literature | 2005 Mar

REPOSITORIES: biostudies-literature

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Global mapping of the protein structure space and application in structure-based inference of protein function.

Hou Jingtong J Jun Se-Ran SR Zhang Chao C Kim Sung-Hou SH

Proceedings of the National Academy of Sciences of the United States of America 20050210 10

We have constructed a map of the "protein structure space" by using the pairwise structural similarity scores calculated for all nonredundant protein structures determined experimentally. As expected, proteins with similar structures clustered together in the map and the overall distribution of structural classes of this map followed closely that of the map of the "protein fold space" we have reported previously. Consequently, proteins sharing similar molecular functions also were found to coloc ...[more]

PMID: 15705717

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