Title | Preliminary crystallographic analysis of two hypothetical ribose-5-phosphate isomerases from Streptococcus mutans |
Authors | Wang, Chen Fan, Xuexin Cao, Xiaofang Liu, Xiang Li, Lanfen Su, Xiaodong |
Affiliation | Peking Univ, Sch Life Sci, State Key Lab Prot & Plant Gene Res, Beijing 100871, Peoples R China. Tianjin Int Joint Acad Biotechnol & Med, High Throughput Mol Drug Discovery Ctr, Tianjin 300457, Peoples R China. Peking Univ, Sch Life Sci, State Key Lab Prot & Plant Gene Res, 5 Yiheyan Rd, Beijing 100871, Peoples R China. |
Keywords | ESCHERICHIA-COLI D-RIBOSE-5-PHOSPHATE ISOMERASE |
Issue Date | 2012 |
Publisher | acta crystallographica section f structural biology and crystallization communications |
Citation | ACTA CRYSTALLOGRAPHICA SECTION F-STRUCTURAL BIOLOGY AND CRYSTALLIZATION COMMUNICATIONS.2012,68,565-568. |
Abstract | Study of the enzymes from sugar metabolic pathways may provide a better understanding of the pathogenesis of the human oral pathogen Streptococcus mutans. Bioinformatics, biochemical and crystallization methods were used to characterize and understand the function of two putative ribose-5-phosphate isomerases: SMU1234 and SMU2142. The proteins were cloned and constructed with N-terminal His tags. Protein purification was performed by Ni2+-chelating and size-exclusion chromatography. The crystals of SUM1234 diffracted to 1.9 angstrom resolution and belonged to space group P2(1)2(1)2(1), with unit-cell parameters a = 48.97, b = 98.27, c = 101.09 angstrom, alpha = beta = gamma = 90 degrees. The optimized SMU2142 crystals diffracted to 2.7 angstrom resolution and belonged to space group P1, with unit-cell parameters a = 53.7, b = 54.1, c = 86.5 angstrom, alpha = 74.2, beta = 73.5, gamma = 83.7 degrees. Initial phasing of both proteins was attempted by molecular replacement; the structure of SMU1234 could easily be solved, but no useful results were obtained for SMU2142. Therefore, SeMet-labelled SMU2142 will be prepared for phasing. |
URI | http://hdl.handle.net/20.500.11897/192140 |
ISSN | 1744-3091 |
DOI | 10.1107/S1744309112009761 |
Indexed | SCI(E) PubMed |
Appears in Collections: | 生命科学学院 |