Gene Rv1821
in Mycobacterium tuberculosis H37Rv
General annotation
| Type | CDS |
| Function | Involved in protein export. May interact with the SECY/SECE subunits. SECA has a central role in coupling the hydrolysis of ATP to the transfer of PRE-secretory periplasmic and outer membrane proteins across the membrane. |
| Product | Possible preprotein translocase ATPase SecA2 |
| Comments | Rv1821, (MTCY1A11.22c), len: 808 aa. Possible secA2, preprotein translocase and ATPase, component of secretion apparatus (see Braunstein & Belisle 2000), similar to several preprotein translocases e.g. P28366|SECA_BACSU preprotein translocase secA subunit from Bacillus subtilis (841 aa), FASTA scores: opt: 1424, E(): 0, (35.9% identity in 786 aa overlap). Equivalent to AL008609|MLCB1788.45 Preprotein translocase SecA 2 from Mycobacterium leprae (778 aa) (87.1% identity in 780 aa overlap). Also similar to Rv3240c|MTCY20B11.15c secA preprotein translocase from Mycobacterium tuberculosis (949 aa). Could be part of the prokaryotic protein translocation apparatus which comprise SECA|Rv3240c, SECD|Rv2587c, SECE|Rv0638, SECF|Rv2586c, SECG|Rv1440 and SECY|Rv0732. Binds ATP. |
| Functional category | Cell wall and cell processes |
| Proteomics | Identified by proteomics at the Statens Serum Institute (Denmark) (see Rosenkrands et al., 2000). Identified in the membrane fraction of M. tuberculosis H37Rv using 1D-SDS-PAGE and uLC-MS/MS (See Gu et al., 2003). Identified in the cell membrane 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). |
| 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 and CDC1551 strains (see Sassetti et al., 2003 and Lamichhane et al., 2003). Required for growth in C57BL/6J mouse spleen, by transposon site hybridization (TraSH) in H37Rv (See Sassetti and Rubin, 2003). Required for survival in primary murine macrophages, by transposon site hybridization (TraSH) in H37Rv (See Rengarajan et al., 2005). Essential gene for in vitro growth of H37Rv, by Himar1 transposon mutagenesis (See Griffin et al., 2011). M. tuberculosis H37Rv secA2|Rv1821 mutant shows growth defect in C57BL/6 mice, and in unactivated bone marrow-derived macrophages from C57BL/6, p47 phox-/-, gp91phox-/-, and NOS2-/- mice; growth is comparable in activated macrophages from C57BL/6; C57BL/6 mice infected with mutant survive longer than with wild-type (See Kurtz et al., 2006). M. tuberculosis H37Rv secA2|Rv1821 mutant shows growth defect in C57BL/6 bone marrow-derived macrophages (See Hou et al., 2008; Rigel et al., 2009) that can not be complemented by secA2 with K115R mutation; K115R in the Walker A motif decreases ATP binding (See Hou et al., 2008). M. tuberculosis H37Rv secA2|Rv1821 mutant colony morpholgy is altered; wild-type M. tuberculosis expressing secA2 with K115R mutation has colony morphology similar to secA2 mutant (See Rigel et al., 2009). Check for mutants available at TARGET website |
Coordinates
| Type | Start | End | Orientation |
|---|---|---|---|
| CDS | 2066457 | 2068883 | + |
Genomic sequence
Feature type
Upstream flanking region (bp)
Downstream flanking region (bp)
Update
Protein sequence
>Mycobacterium tuberculosis H37Rv|Rv1821|secA2
VNVHGCPRIAACRCTDTHPRGRPAFAYRWFVPKTTRAQPGRLSSRFWRLLGASTEKNRSRSLADVTASAEYDKEAADLSDEKLRKAAGLLNLDDLAESADIPQFLAIAREAAERRTGLRPFDVQLLGALRMLAGDVIEMATGEGKTLAGAIAAAGYALAGRHVHVVTINDYLARRDAEWMGPLLDAMGLTVGWITADSTPDERRTAYDRDVTYASVNEIGFDVLRDQLVTDVNDLVSPNPDVALIDEADSVLVDEALVPLVLAGTTHRETPRLEIIRLVAELVGDKDADEYFATDSDNRNVHLTEHGARKVEKALGGIDLYSEEHVGTTLTEVNVALHAHVLLQRDVHYIVRDDAVHLINASRGRIAQLQRWPDGLQAAVEAKEGIETTETGEVLDTITVQALINRYATVCGMTGTALAAGEQLRQFYQLGVSPIPPNKPNIREDEADRVYITTAAKNDGIVEHITEVHQRGQPVLVGTRDVAESEELHERLVRRGVPAVVLNAKNDAEEARVIAEAGKYGAVTVSTQMAGRGTDIRLGGSDEADHDRVAELGGLHVVGTGRHHTERLDNQLRGRAGRQGDPGSSVFFSSWEDDVVAANLDHNKLPMATDENGRIVSPRTGSLLDHAQRVAEGRLLDVHANTWRYNQLIAQQRAIIVERRNTLLRTVTAREELAELAPKRYEELSDKVSEERLETICRQIMLYHLDRGWADHLAYLADIRESIHLRALGRQNPLDEFHRMAVDAFASLAADAIEAAQQTFETANVLDHEPGLDLSKLARPTSTWTYMVNDNPLSDDTLSALSLPGVFR
Bibliography
- Rosenkrands I et al. [2000]. Towards the proteome of Mycobacterium tuberculosis. Proteomics
- Braunstein M and Belisle JT [2000]. Review
- Braunstein M et al. [2001]. Two nonredundant SecA homologues function in mycobacteria. Homolog Secondary Function
- Braunstein M et al. [2003]. SecA2 functions in the secretion of superoxide dismutase A and in the virulence of Mycobacterium tuberculosis. Mutant Secondary Function
- Gu S et al. [2003]. Comprehensive proteomic profiling of the membrane constituents of a Mycobacterium tuberculosis strain. Proteomics
- Sassetti CM et al. [2003]. Genes required for mycobacterial growth defined by high density mutagenesis. Mutant
- Lamichhane G et al. [2003]. A postgenomic method for predicting essential genes at subsaturation levels of mutagenesis: application to Mycobacterium tuberculosis. Mutant
- Sassetti CM and Rubin EJ [2003]. Genetic requirements for mycobacterial survival during infection. Mutant
- Mawuenyega KG et al. [2005]. Mycobacterium tuberculosis functional network analysis by global subcellular protein profiling. Proteomics
- Rengarajan J et al. [2005]. Genome-wide requirements for Mycobacterium tuberculosis adaptation and survival in macrophages. Mutant
- Kurtz S et al. [2006]. The SecA2 secretion factor of Mycobacterium tuberculosis promotes growth in macrophages and inhibits the host immune response. Mutant
- Hou JM et al. [2008]. ATPase activity of Mycobacterium tuberculosis SecA1 and SecA2 proteins and its importance for SecA2 function in macrophages. Function Mutant
- Rigel NW et al. [2009]. The Accessory SecA2 System of Mycobacteria Requires ATP Binding and the Canonical SecA1. 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
