Eicosapentapeptide repeats (EPRs): novel repeat proteins specific to flowering plants | Zendy

Sunil Archak | Zendy; Javaregowda Nagaraju | Zendy

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Eicosapentapeptide repeats (EPRs): novel repeat proteins specific to flowering plants

Author(s) -

Sunil Archak,

Javaregowda Nagaraju

Publication year - 2006

Publication title -

bioinformatics

Language(s) - English

Resource type - Journals

SCImago Journal Rank - 3.599

H-Index - 390

eISSN - 1367-4811

pISSN - 1367-4803

DOI - 10.1093/bioinformatics/btl340

Subject(s) - computational biology , biology , peptide sequence , tandem repeat , genetics , conserved sequence , genome , gene

In this report, we describe a novel tandem peptide repeat protein, Eicosapentapeptide repeat (EPR), which occurs notably only in flowering plants. The EPRs are characterized by a 25 amino acid repeat unit, X(2)CX(4)CX(10)CX(2)HGGG, repeated 10 times tandemly. Sequence search revealed that the repeat motif is highly conserved across its occurrence. EPRs are predicted to exist as quasi-globular stable structures owing to highly conserved amino acid positions and potential disulfide bridges. Proteins containing EPRs are predicted to be located in chloroplasts; non-enzymatic and peptide or DNA-binding in molecular function; and they are possibly involved in transcription regulation.

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