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3EEO

M. HhaI co-crystallized with synthetic dsDNA containing a propane diol in place of the deoxycytidine residue targeted for methylation.

Functional Information from GO Data
ChainGOidnamespacecontents
A0003677molecular_functionDNA binding
A0003886molecular_functionDNA (cytosine-5-)-methyltransferase activity
A0008168molecular_functionmethyltransferase activity
A0009307biological_processDNA restriction-modification system
A0016740molecular_functiontransferase activity
A0032259biological_processmethylation
Functional Information from PDB Data
site_idAC1
Number of Residues8
DetailsBINDING SITE FOR RESIDUE PDI D 427
ChainResidue
ASER85
AARG165
ATHR250
ASER252
AHOH339
DHOH82
DDG426
DDG428

site_idAC2
Number of Residues22
DetailsBINDING SITE FOR RESIDUE SAM A 328
ChainResidue
ALEU21
AGLY23
AASN39
AGLU40
ATRP41
AASP42
AASP60
AILE61
AGLY78
APRO80
ALEU100
ATYR285
AASN304
ASER305
AVAL306
AHOH343
AHOH344
AHOH360
AHOH386
AHOH393
AHOH400
APHE18

Functional Information from PROSITE/UniProt
site_idPS00094
Number of Residues13
DetailsC5_MTASE_1 C-5 cytosine-specific DNA methylases active site. DiLcaGfPCqAFS
ChainResidueDetails
AASP73-SER85

site_idPS00095
Number of Residues19
DetailsC5_MTASE_2 C-5 cytosine-specific DNA methylases C-terminal signature. KqfGNSVvInVlqyIaynI
ChainResidueDetails
ALYS300-ILE318

Functional Information from SwissProt/UniProt
site_idSWS_FT_FI1
Number of Residues313
DetailsDomain: {"description":"SAM-dependent MTase C5-type","evidences":[{"source":"PROSITE-ProRule","id":"PRU01016","evidenceCode":"ECO:0000255"}]}
ChainResidueDetails

site_idSWS_FT_FI2
Number of Residues1
DetailsActive site: {"evidences":[{"source":"PubMed","id":"7899082","evidenceCode":"ECO:0000305"}]}
ChainResidueDetails

Catalytic Information from CSA
site_idMCSA1
Number of Residues4
DetailsM-CSA 293
ChainResidueDetails

246031

PDB entries from 2025-12-10

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