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pubmed-article:19266317pubmed:abstractTextC-H....pi interactions are known to be important contributors to protein stability. In this study, we have analyzed the influence of C-H....pi interactions in single chain "all-alpha" proteins. In the data set, a total of 181 C-H....pi interactions were observed. The most prominent representatives are the interactions between aromatic C-H donor groups and aromatic pi acceptors. Eighty-one percent of the C-H....pi interactions between side chain to side chain and remaining19% of the C-H....pi interactions were observed between side-chain to side-chain five-member aromatic ring. The donor atom contribution to C-H....pi interactions was mainly from Phe, Tyr, and Trp residues. The acceptor atom contribution to C-H....pi interactions was mainly from Phe, Tyr, Trp, and His. The highest percentage of C-H....pi interactions were observed form Phe residue. The secondary structure preference analysis of all C-H....pi interacting residues showed that Phe, Tyr, Trp, and His preferred to be in helix. Long-range C-H....pi interactions are the predominant type of interactions in single chain all-alpha proteins data set. All the C-H....pi interactions forming residues in the data set preferred to be in the buried region. Seventy-three percent of the donor residues and 65% of the acceptor residues are highly conserved.lld:pubmed
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pubmed-article:19266317pubmed:issn1559-0291lld:pubmed
pubmed-article:19266317pubmed:authorpubmed-author:ShanthaNNlld:pubmed
pubmed-article:19266317pubmed:authorpubmed-author:RamanathanKKlld:pubmed
pubmed-article:19266317pubmed:authorpubmed-author:RaoSethumadha...lld:pubmed
pubmed-article:19266317pubmed:issnTypeElectroniclld:pubmed
pubmed-article:19266317pubmed:volume160lld:pubmed
pubmed-article:19266317pubmed:ownerNLMlld:pubmed
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pubmed-article:19266317pubmed:pagination1473-83lld:pubmed
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pubmed-article:19266317pubmed:year2010lld:pubmed
pubmed-article:19266317pubmed:articleTitleExploring the role of C-H....pi interactions on the structural stability of single chain "all-alpha" proteins.lld:pubmed
pubmed-article:19266317pubmed:affiliationSchool of Biotechnology, Chemical and Biomedical Engineering, Bioinformatics Division, Vellore Institute of Technology, Vellore 632014, Tamil Nadu, India.lld:pubmed
pubmed-article:19266317pubmed:publicationTypeJournal Articlelld:pubmed