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Description:
Methylated-DNA--protein-cysteine methyltransferase (EC 2.1.1.63) (6-O-methylguanine-DNA methyltransferase) (MGMT) (O-6-methylguanine-DNA-alkyltransferase).
Molecular weight: 17996
View which proteins in this organism that is involved with DNA Repair;
classified after biological processes (using data from the GOA project):
DNA repair( GO:0006281 ) DNA dealkylation( GO:0006307 )
Important dates:
10-MAY-2004, integrated into UniProtKB/Swiss-Prot.
01-OCT-2002, sequence version 1.
07-MAR-2006, entry version 18.
Phylogenetic order:
Archaea Euryarchaeota Methanomicrobia Methanosarcinales Methanosarcinaceae Methanosarcina.
To calculate the pI (Isoelectric point - the pH where a protein has a neutral charge),
go to this page and enter the protein ID (e.g 3MG_ECOLI): http://us.expasy.org/tools/pi_tool.html
Links to references in other databases for protein OGT_METMA:
| Database | Pointer | Add. info#1 | Add. info#2 |
| EMBL | AE008384 | AAM30716.1 | - |
| HSSP | P06134 | 1SFE | |
| GenomeReviews | AE008384_GR | MM1020.1 | |
| BioCyc | MMAZ192952:MM1020-MONOMER | -.1 | |
| HAMAP | MF_00772 | - | 1. |
| InterPro | IPR008332 | MethylG_mtfrase. | |
| InterPro | IPR001497 | Methyltransf_1. | |
| InterPro | IPR011991 | Wing_hlx_DNA_bd. | |
| Pfam | PF01035 | DNA_binding_1 | 1. |
| Pfam | PF02870 | Methyltransf_1N | 1. |
| TIGRFAMs | TIGR00589 | ogt | 1. |
| PROSITE | PS00374 | MGMT | 1. |
Keywords:
Complete proteome; DNA damage; DNA repair; Methyltransferase; Transferase.
References:
RN [1]
RP NUCLEOTIDE SEQUENCE [LARGE SCALE GENOMIC DNA].
RC STRAIN=Goe1 / Go1 / ATCC BAA-199 / DSM 3647 / OCM 88;
RX MEDLINE=22120827; PubMed=12125824;
RA Deppenmeier U., Johann A., Hartsch T., Merkl R., Schmitz R.A.,
RA Martinez-Arias R., Henne A., Wiezer A., Baeumer S., Jacobi C.,
RA Brueggemann H., Lienard T., Christmann A., Boemecke M., Steckel S.,
RA Bhattacharyya A., Lykidis A., Overbeek R., Klenk H.-P., Gunsalus R.P.,
RA Fritz H.-J., Gottschalk G.;
RT "The genome of Methanosarcina mazei: evidence for lateral gene
RT transfer between Bacteria and Archaea.";
RL J. Mol. Microbiol. Biotechnol. 4:453-461(2002).
Feature:
CHAIN 1 158 Methylated-DNA--protein-cysteine
methyltransferase.
/FTId=PRO_0000139379.
ACT_SITE 126 126 Alkyl group acceptor (By similarity).
Comments:
-!- FUNCTION: Involved in the cellular defense against the biological
effects of O6-methylguanine (O6-MeG) in DNA. Repairs alkylated
guanine in DNA by stoichiometrically transferring the alkyl group
at the O-6 position to a cysteine residue in the enzyme. This is a
suicide reaction: the enzyme is irreversibly inactivated (By
similarity).
-!- CATALYTIC ACTIVITY: DNA (containing 6-O-methylguanine) + protein
L-cysteine = DNA (without 6-O-methylguanine) + protein S-methyl-L-
cysteine.
-!- SUBCELLULAR LOCATION: Cytoplasm (By similarity).
-!- SIMILARITY: Belongs to the MGMT family.
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Sequence length: 158
MYYHIIKSPI YPILLAGDEK GLKHLIFLKD ERKAKIPNDW VENKDFFREV SNQLEAYFSG
KLKTFDVKLA PQGTEFQKSV WKALCEIPCG ETRTYGEIAK RIQNPKAYRA VGLANNRNPI
AIIVPCHRVI GANGKLTGYA SGLDIKEFLL KLEENNLK