Mycobacterial PE_PGRS Proteins Contain Calcium-Binding Motifs with Parallel β-roll Folds |
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作者单位: | Nandita Bachhawat(Department of Bioinformatics, DAV College, Chandigarh 160012, India) ;Balvinder Singh(Institute of Microbial Technology,Chandigarh 160036, India) ; |
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摘 要: | The PE_PGRS family of proteins unique to mycobacteria is demonstrated to con- rain multiple calcium-binding and glycine-rich sequence motifs GGXGXD/NXUX. This sequence repeat constitutes a calcium-binding parallel/3-roll or parallel β-helix structure and is found in RTX toxins secreted by many Gram-negative bacteria. It is predicted that the highly homologous PE_PGRS proteins containing multiple copies of the nona-peptide motif could fold into similar calcium-binding structures. The implication of the predicted calcium-binding property of PE_PGRS proteins in the Ught of macrophage-pathogen interaction and pathogenesis is presented.
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关 键 词: | 肺结核 度性因素 基序 钙元素 支原体病菌 |
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