Gene Rv0427c (xth)
in Mycobacterium tuberculosis H37Rv
General annotation
| Type | CDS |
| Function | Involved in base excision repair. Apurinic-apyrimidinic endonuclease. Supposed to remove the damaged DNA at cytosines and guanines by cleaving at the 3' side of the AP site by a beta-elimination reaction. Possibly exhibites 3'-5'-exonuclease, 3'-phosphomonoesterase, 3'-repair diesterase and ribonuclease H activities [catalytic activity: degradation of double-stranded DNA. It acts progressively in a 3'- to 5'-direction, releasing 5'-phosphomononucleotides]. |
| Product | Probable exodeoxyribonuclease III protein XthA (exonuclease III) (EXO III) (AP endonuclease VI) |
| Comments | Rv0427c, (MTCY22G10.24c), len: 291 aa. Probable xthA (alternate gene name: xth), exodeoxyribonuclease III protein (see citation below), similar to others e.g. EX3_ECOLI|P09030 exodeoxyribonuclease III from Escherichia Coli strain K12 (268 aa), FASTA scores: opt: 360, E(): 1.2e-17, (29.3% identity in 270 aa overlap); etc. Belongs to the AP/EXOA family of DNA repair enzymes. |
| Functional category | Information pathways |
| Proteomics | 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). Translational start site supported by proteomics data (See Kelkar et al., 2011). |
| 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). Required for growth in C57BL/6J mouse spleen, by transposon site hybridization (TraSH) in H37Rv (See Sassetti and Rubin, 2003). Non-essential gene for in vitro growth of H37Rv, by Himar1 transposon mutagenesis (See Griffin et al., 2011). Check for mutants available at TARGET website |
Coordinates
| Type | Start | End | Orientation |
|---|---|---|---|
| CDS | 516017 | 516892 | - |
Genomic sequence
Feature type
Upstream flanking region (bp)
Downstream flanking region (bp)
Update
Protein sequence
>Mycobacterium tuberculosis H37Rv|Rv0427c|xthA
MPDGTIDGGHPQRPASPRLRSPLLRLATWNVNSIRTRLDRVLDWLGRADVDVLAMQETKCPDGQFPALPLFELGYDVAHVGFDQWNGVAIASRVGLDDVRVGFDGQPSWSGKPEVAATTEARALGATCGGIRVWSLYVPNGRALDDPHYTYKLDWLAALRDTAEGWLRDDPAAPIALMGDWNIAPTDDDVWSTEFFAGCTHVSEPERKAFNAIVDAQFTDVVRPFTPGPGVYTYWDYTQLRFPKKQGMRIDFILGSPALAARVMDAQIVREERKGKAPSDHAPVLVDLHAG
Bibliography
- Mizrahi V et al. [1998]. DNA repair in Mycobacterium tuberculosis. What have we learnt from the genome sequence? Secondary Function
- Sassetti CM and Rubin EJ [2003]. Genetic requirements for mycobacterial survival during infection. Mutant
- de Souza GA et al. [2011]. Bacterial proteins with cleaved or uncleaved signal peptides of the general secretory pathway. Proteomics
- Kelkar DS et al. [2011]. Proteogenomic analysis of Mycobacterium tuberculosis by high resolution mass spectrometry. Proteomics Sequence
- Griffin JE et al. [2011]. High-resolution phenotypic profiling defines genes essential for mycobacterial growth and cholesterol catabolism. Mutant
- 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
