Description:
Methylated-DNA--protein-cysteine methyltransferase (EC 2.1.1.63) (6-O-methylguanine-DNA methyltransferase) (MGMT) (O-6-methylguanine-DNA-alkyltransferase).
Molecular weight: 20455
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 )
Important dates:
01-NOV-1995, integrated into UniProtKB/Swiss-Prot.
10-MAY-2004, sequence version 2.
07-MAR-2006, entry version 41.
Phylogenetic order:
Bacteria Proteobacteria Gammaproteobacteria Pasteurellales Pasteurellaceae Haemophilus.
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_HAEIN:
| Database | Pointer | Add. info#1 | Add. info#2 |
| EMBL | L42023 | AAC22061.1 | ALT_INIT |
| PIR | G64065 | G64065. | |
| HSSP | P16455 | 1QNT | |
| GenomeReviews | L42023_GR | HI0402.1 | |
| TIGR | HI0402 | -. | |
| BioCyc | HINF71421:HI0402-MONOMER | -.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=Rd / KW20 / ATCC 51907;
RX MEDLINE=95350630; PubMed=7542800;
RA Fleischmann R.D., Adams M.D., White O., Clayton R.A., Kirkness E.F.,
RA Kerlavage A.R., Bult C.J., Tomb J.-F., Dougherty B.A., Merrick J.M.,
RA McKenney K., Sutton G.G., FitzHugh W., Fields C.A., Gocayne J.D.,
RA Scott J.D., Shirley R., Liu L.-I., Glodek A., Kelley J.M.,
RA Weidman J.F., Phillips C.A., Spriggs T., Hedblom E., Cotton M.D.,
RA Utterback T.R., Hanna M.C., Nguyen D.T., Saudek D.M., Brandon R.C.,
RA Fine L.D., Fritchman J.L., Fuhrmann J.L., Geoghagen N.S.M.,
RA Gnehm C.L., McDonald L.A., Small K.V., Fraser C.M., Smith H.O.,
RA Venter J.C.;
RT "Whole-genome random sequencing and assembly of Haemophilus influenzae
RT Rd.";
RL Science 269:496-512(1995).
Feature:
CHAIN 1 179 Methylated-DNA--protein-cysteine
methyltransferase.
/FTId=PRO_0000139366.
ACT_SITE 130 130 Alkyl group acceptor (Potential).
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.
-!- SIMILARITY: Belongs to the MGMT family.
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Sequence length: 179
MTALYYTYYP SPVGRLLILS DGESITHIDF EKEQYAPNPK WHKQDELPVF QKVRLAFERY
FNGEVECFSN IPLKPEGTAF QQAIWQALRE IDYGELSTYG ELALRINNPK AVRAVGGAVG
SNPISIIIPC HRILGKDRTL TGFGGGLEAK RFLLQLEKIP YIDKGTENTK PRFFKKYHE