Gene Rv0252 (nasB)
in Mycobacterium tuberculosis H37Rv
General annotation
| Type | CDS |
| Function | Involved in nitrate assimilation (denitrification) (at the second step). This enzyme is a FAD flavoprotein that also contains a siroheme and one 2FE-2S iron-sulfur center [catalytic activity: 3 NAD(P)H + nitrite = 3 NAD(P)+ + NH4OH + H2O.] |
| Product | Probable nitrite reductase [NAD(P)H] large subunit [FAD flavoprotein] NirB |
| Comments | Rv0252, (MTV034.18), len: 853 aa. Probable nirB (alternate gene name: nasB), nitrite reductase [NAD(P)H] large subunit, flavoprotein containing siroheme and a 2FE-2S iron-sulfur centre. Highly similar to many others bacterial enzymes e.g. P08201|NIRB_ECOLI nitrite reductase (NAD(P)H) large subunit from Escherichia coli strain K12 (847 aa), FASTA scores: opt: 2775, E(): 0, (49.8% identity in 840 aa overlap); Q06458|NIRB_KLEPN nitrite reductase (NAD(P)H) large subunit (957 aa), FASTA scores: opt: 2902, E(): 0, (54.2% identity in 827 aa overlap). Contains PS00365 Nitrite and sulfite reductases iron-sulfur/siroheme-binding site. Homodimer which associates with NIRD|Rv0253. Cofactors: FAD; Iron; Siroheme. |
| Functional category | Intermediary metabolism and respiration |
| Proteomics | Identified in the cytosol and cell membrane fraction of M. tuberculosis H37Rv using 2DLC/MS (See Mawuenyega et al., 2005). Identified by mass spectrometry in M. tuberculosis H37Rv-infected guinea pig lungs at 30 and 90 days (See Kruh et al., 2010). |
| Mutant | Non-essential gene for in vitro growth of H37Rv in a MtbYM rich medium, by Himar1 transposon mutagenesis (see Minato et al. 2019). Non-essential gene for in vitro growth of H37Rv, by analysis of saturated Himar1 transposon libraries (see DeJesus et al. 2017). Non essential gene by Himar1 transposon mutagenesis in H37Rv strain (see Sassetti et al., 2003). Check for mutants available at TARGET website |
Coordinates
| Type | Start | End | Orientation |
|---|---|---|---|
| CDS | 302866 | 305427 | + |
Genomic sequence
Feature type
Upstream flanking region (bp)
Downstream flanking region (bp)
Update
Protein sequence
>Mycobacterium tuberculosis H37Rv|Rv0252|nirB
MPTAGSSRAPAAAREIVVVGHGMVGHRLVEAVRARDADGSLRITVLAEEGDAAYDRVGLTSYTESWDRALLALPGNDYAGDQRVRLLLNTRVTQIDRATKSVVTAAGQRHRYDTLVLATGSYAFVPPVPGHDLPACHVYRTFDDLDAIRAGAQRTLDGGHTDGGVVIGGGLLGLEAANALRQFGLQTHVVEMMPRLMAQQIDEAGGALLARMIADLGIAVHVGTGTESIESVKHSDGSVWARVRLSDGEVIDAGVVIFAAGIRPRDELARAAGLAIGDRGGVLTDLSCRTSDPDIYAVGEVAAIDGRCYGLVGPGYTSAEVVADRLLDGSAEFPEADLSTKLKLLGVDVASFGDAMGATENCLEVVINDAVKRTYAKLVLSDDATTLLGGVLVGDASSYGVLRPMVGAELPGDPLALIAPAGSGAGAGALGVGALPDSAQICSCNNVTKGELKCAIADGCGDVPALKSCTAAGTSCGSCVPLLKQLLEAEGVEQSKALCEHFSQSRAELFEIITATEVRTFSGLLDRFGRGKGCDICKPVVASILASTGSDHILDGEQASLQDSNDHFLANIQKNGSYSVVPRVPGGDIKPEHLILIGQIAQDFGLYTKITGGQRIDLFGARVDQLPLIWQRLVDGGMESGHAYGKAVRTVKSCVGSDWCRYGQQDSVQLAIDLELRYRGLRAPHKIKLGVSGCARECAEARGKDVGVIATEKGWNLYVAGNGGMTPKHAQLLASDLDKETLIRYIDRFLIYYIRTADRLQRTAPWVESLGLDHVREVVCEDSLGLAEEFEAAMQRHVANYKCEWKGVLEDPDKLSRFVSFVNAPDAVDSTVTFTERAGRKVPVSIGIPRVRS
Bibliography
- 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
- Kruh NA et al. [2010]. Portrait of a pathogen: the Mycobacterium tuberculosis proteome in vivo. 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
