Gene Rv3464 (rfbB)
in Mycobacterium tuberculosis H37Rv
General annotation
| Type | CDS |
| Function | Involved in dTDP-L-rhamnose biosynthesis [catalytic activity: dTDP-glucose = dTDP-4-dehydro-6-deoxy-D-glucose + H(2)O]. |
| Product | dTDP-glucose 4,6-dehydratase RmlB |
| Comments | Rv3464, (MTCY13E12.17), len: 331 aa. RmlB (alternate gene name: rfbB), dTDP-glucose-4,6-dehydratase (see citations below), nearly identical to Q50556|RMLB rhamnose biosynthesis protein from Mycobacterium tuberculosis (329 aa) (previously rfbB, now known as rmlB). Equivalent to Q9CBH7|RMLB|ML1964 dTDP-glucose 4,6-dehydratase (alias Q9X7A3|RMLB putative dTDP-(glucose or rhamnose)-4,6-dehydratase (331 aa)) from Mycobacterium leprae (333 aa), FASTA scores: opt: 1925, E(): 1.9e-112, (84.0% identity in 331 aa overlap). Also highly similar to others e.g. Q9UZH2|RFBB|PAB0785 from Pyrococcus abyssi (333 aa), FASTA scores: opt: 1115, E(): 4.2e-62, (51.55% identity in 322 aa overlap); O27817|MTH1789 from Methanobacterium thermoautotrophicum (336 aa), FASTA scores: opt: 1104, E(): 2.1e-61, (51.65% identity in 331 aa overlap); BAB60064|TVG0950610 from Thermoplasma volcanium (318 aa), FASTA scores: opt: 1102, E(): 2.6e-61, (49.65% identity in 310 aa overlap); etc. Also related to P72050|MTCY13D12.18|RV3784 hypothetical 36.3 KDA protein (similar to galactowaldenases from eukaryotic and prokaryotic origin) from Mycobacterium tuberculosis (326 aa), FASTA scores: E(): 1.4e-26, (33.8% identity in 320 aa overlap). |
| Functional category | Intermediary metabolism and respiration |
| Proteomics | Identified in the cell wall fraction of M. tuberculosis H37Rv using 2DLC/MS (See Mawuenyega et al., 2005). Identified by mass spectrometry in whole cell lysates of M. tuberculosis H37Rv but not the culture filtrate or membrane protein fraction (See de Souza et al., 2011). |
| Transcriptomics | mRNA identified by microarray analysis and down-regulated after 24h and 96h of starvation (see Betts et al., 2002). |
| Mutant | Essential gene for in vitro growth of H37Rv in a MtbYM rich medium, by Himar1 transposon mutagenesis (see Minato et al. 2019). Essential gene for in vitro growth of H37Rv, by analysis of saturated Himar1 transposon libraries (see DeJesus et al. 2017). Essential gene by Himar1 transposon mutagenesis in H37Rv strain (see Sassetti et al., 2003). Essential gene for in vitro growth of H37Rv, by Himar1 transposon mutagenesis (See Griffin et al., 2011). M. smegmatis knockout shows rmlB is essential for growth (See Li et al., 2006). Check for mutants available at TARGET website |
Coordinates
| Type | Start | End | Orientation |
|---|---|---|---|
| CDS | 3881837 | 3882832 | + |
Genomic sequence
Feature type
Upstream flanking region (bp)
Downstream flanking region (bp)
Update
Protein sequence
>Mycobacterium tuberculosis H37Rv|Rv3464|rmlB
MRLLVTGGAGFIGTNFVHSAVREHPDDAVTVLDALTYAGRRESLADVEDAIRLVQGDITDAELVSQLVAESDAVVHFAAESHVDNALDNPEPFLHTNVIGTFTILEAVRRHGVRLHHISTDEVYGDLELDDRARFTESTPYNPSSPYSATKAGADMLVRAWVRSYGVRATISNCSNNYGPYQHVEKFIPRQITNVLTGRRPKLYGAGANVRDWIHVDDHNSAVRRILDRGRIGRTYLISSEGERDNLTVLRTLLRLMDRDPDDFDHVTDRVGHDLRYAIDPSTLYDELCWAPKHTDFEEGLRTTIDWYRDNESWWRPLKDATEARYQERGQ
Bibliography
- Allard ST et al. [2000]. The purification, crystallization and structural elucidation of dTDP-D-glucose 4,6-dehydratase (RmlB), the second enzyme of the dTDP-L-rhamnose synthesis pathway from Salmonella enterica serovar typhimurium. Homolog Product Structure
- Ma Y, Stern RJ, Scherman MS, Vissa VD, Yan W, Jones VC, Zhang F, Franzblau SG, Lewis WH and McNeil MR [2001]. Drug targeting Mycobacterium tuberculosis cell wall synthesis: genetics of dTDP-rhamnose synthetic enzymes and development of a microtiter plate-based screen for inhibitors of conversion of dTDP-glucose to dTDP-rhamnose. Product Biochemistry Function
- Betts JC et al. [2002]. Evaluation of a nutrient starvation model of Mycobacterium tuberculosis persistence by gene and protein expression profiling. Transcriptome
- Sassetti CM et al. [2003]. Genes required for mycobacterial growth defined by high density mutagenesis. Mutant
- Mawuenyega KG et al. [2005]. Mycobacterium tuberculosis functional network analysis by global subcellular protein profiling. Proteomics
- Li W et al. [2006]. rmlB and rmlC genes are essential for growth of mycobacteria. Mutant
- Griffin JE et al. [2011]. High-resolution phenotypic profiling defines genes essential for mycobacterial growth and cholesterol catabolism. Mutant
- de Souza GA et al. [2011]. Bacterial proteins with cleaved or uncleaved signal peptides of the general secretory pathway. Proteomics
- DeJesus MA et al. [2017]. Comprehensive Essentiality Analysis of the Mycobacterium tuberculosis Genome via Saturating Transposon Mutagenesis. Mutant
- Minato Y et al. [2019]. Genomewide Assessment of Mycobacterium tuberculosis Conditionally Essential Metabolic Pathways. Mutant
