| Accession | TIGR01704 |
| Name | MTA/SAH-Nsdase |
| Function | MTA/SAH nucleosidase |
| Gene Symbol | mtnN |
| Trusted Cutoff | 73.80 |
| Domain Trusted Cutoff | 73.80 |
| Noise Cutoff | 58.20 |
| Domain Noise Cutoff | 58.20 |
| Isology Type | equivalog |
| EC Number | 3.2.2.16 3.2.2.9 |
| HMM Length | 229 |
| Mainrole Category | Central intermediary metabolism |
| Subrole Category | Other |
| Gene Ontology Term | GO:0008782: adenosylhomocysteine nucleosidase activity molecular_function |
| | GO:0008930: methylthioadenosine nucleosidase activity molecular_function |
| | GO:0019509: L-methionine salvage from methylthioadenosine biological_process |
| Author | Selengut J |
| Entry Date | Sep 25 2002 5:15PM |
| Last Modified | Feb 14 2011 3:27PM |
| Comment | This model represents the enzyme 5-methylthioadenosine/S-adenosylhomocysteine nucleosidase which acts on its two substrates at the same active site. This enzyme is involved in the recycling of the components of S-adenosylmethionine after it has donated one of its two non-ribose sulfur ligands to an acceptor. In the case of 5-methylthioadenosine this represents the first step of the methionine salvage pathway in bacteria [1,2,3]. This enzyme is widely distributed in bacteria, especially those that lack adenosylhomocysteinase (EC 3.3.1.1).
One clade of bacteria including Agrobacterium, Mesorhizobium, Sinorhizobium and Brucella includes sequences annotated as MTA/SAH nucleotidase, but differs significantly in homology and has no independent experimental evidence.
There are homologs of this enzyme in plants, some of which score between trusted and noise cutoffs here, but there is no experimental evidence to validate this function at this time. |
| References | RN [1]
RM PMID: 10574451
RT Identification of yrrU as the methylthioadenosine nucleosidase gene in Bacillus subtilis.
RA Sekowska A, Danchin A.
RL DNA Res 1999 Oct 29;6(5):255-64
RN [2]
RM PMID: 11591349
RT Structure of E. coli 5'-methylthioadenosine/S-adenosylhomocysteine nucleosidase reveals similarity to the purine nucleoside phosphorylases.
RA Lee JE, Cornell KA, Riscoe MK, Howell PL.
RL Structure (Camb) 2001 Oct;9(10):941-53
RN [3]
RM PMID: 12022921
RT The methionine salvage pathway in Bacillus subtilis
RA Sekowska A, Danchin, A.
RL BMC Microbiology 2001; 2:8
DR HAMAP; MF_01684; 143 of 146 |
| Genome Property | GenProp0730: methylthioadenosine to methylthioribose-1-phosphate via MTR (HMM) |
| | GenProp0757: quorum-sensing, autoinducer-2 system (HMM) |
