Reviewed, UniProtKB/Swiss-Prot P25262 (MTB1_HERAU)

Names and origin

Protein names

Recommended name:
    Modification methylase HgiBI
      Short name=M.HgiBI
    EC=2.1.1.37
Alternative name(s):
    Cytosine-specific methyltransferase HgiBI

Gene names

Name:

hgiBIM

Organism

Herpetosiphon aurantiacus (Herpetosiphon giganteus)

Taxonomic identifier

65 [NCBI]

Taxonomic lineage

Bacteria › Chloroflexi › Herpetosiphonales › Herpetosiphonaceae › Herpetosiphon

Protein attributes

Sequence length	437 AA.
Sequence status	Complete.
Sequence processing	The displayed sequence is not processed.
Protein existence	Inferred from homology.

General annotation (Comments)

Function	This methylase recognizes the double-stranded sequence GGWCC, causes specific methylation on C-? on both strands, and protects the DNA from cleavage by the HgiBI endonuclease.
Catalytic activity	S-adenosyl-L-methionine + DNA = S-adenosyl-L-homocysteine + DNA containing 5-methylcytosine.
Sequence similarities	Belongs to the C5-methyltransferase family.

Ontologies

Keywords
Biological process	Restriction system
Ligand	S-adenosyl-L-methionine
Molecular function	Methyltransferase Transferase
Gene Ontology (GO)
Biological process	DNA methylation Inferred from electronic annotation. Source: InterPro DNA restriction-modification system Inferred from electronic annotation. Source: UniProtKB-KW
Molecular function	DNA (cytosine-5-)-methyltransferase activity Inferred from electronic annotation. Source: EC DNA binding Inferred from electronic annotation. Source: InterPro
Complete GO annotation...

Sequence annotation (Features)

	Feature key	Position(s)	Length	Description	Graphical view	Feature identifier
Molecule processing
	Chain	1 – 437	437	Modification methylase HgiBI		PRO_0000087885
Sites
	Active site	75	1	By similarity

Sequences

	Sequence		Length	Mass (Da)
	P25262-1 [UniParc]. Last modified May 1, 1992. Version 1. Checksum: 70A658159D8D23AD	FASTA	437	49,627
	10 20 30 40 50 60 MQQFRFIDLF AGIGGFRLGL EAVGGVCVAS AEIDQQAIKV YRQNWPTDGV DHNLGDITAI 70 80 90 100 110 120 QQLPAHDVLV GGVPCQPWSI AGKNQAFDDP RGQLWADVIR LVQINQPKAF IFENVKGLVD 130 140 150 160 170 180 PRNRLCLEII LDSFKDLGYS VFYKLLNSFD FGVAQNRDRV FIVGIQQKLD LNGFSFPEYT 190 200 210 220 230 240 ESEQRLYHIL DNLEVPETKL ESIPIQRNLF GERIDVGYNK LTPRGAFNDF FILNDIRNGP 250 260 270 280 290 300 TSIHSWEIYP TTEREKQICM IIMRNRRNSR YGDCDGNPMS YQDIAELVAG LAEKELQTLV 310 320 330 340 350 360 EKRILRQYPD GKYEFFNRRL SGGIDGTYRI FLPNARFFGT LTARGMHDEI AEISVSGANA 370 380 390 400 410 420 EEYKHNFIQQ VLIPKRYRKI TVSEAARLQG FPGSFQFHSN QSANFRLIGN SVAPPVIVAL 430 GKALQCVKLF EQELCEV

References

[1]	"Isolation and genetic structure of the AvaII isoschizomeric restriction-modification system HgiBI from Herpetosiphon giganteus Hpg5: M.HgiBI reveals high homology to M.BanI." Duesterhoeft A., Erdmann D., Kroeger M. Nucleic Acids Res. 19:3207-3211(1991) [PubMed: 2062638] [Abstract] Cited for: NUCLEOTIDE SEQUENCE [GENOMIC DNA]. Strain: HPG5.
[2]	"Organization and gene expression within restriction-modification systems of Herpetosiphon giganteus." Kroeger M., Blum E., Deppe E., Duesterhoeft A., Erdmann D., Kilz S., Meyer-Rogge S., Moestl D. Gene 157:43-47(1995) [PubMed: 7607523] [Abstract] Cited for: DISCUSSION OF SEQUENCE.

Cross-references

Sequence databases
EMBLGenBankDDBJ	X55137 Genomic DNA. Translation: CAA38927.1.
PIR	S22307.
3D structure databases
HSSP	HSSP built from PDB template 6MHT based on UniProtKB P05102.
ModBase	Search...
Protein family/group databases
REBASE	3414. M.HgiBI.
Enzyme and pathway databases
BRENDA	2.1.1.37. 291850.
Family and domain databases
InterPro	IPR001525. C5_DNA_meth. IPR018117. C5_DNA_meth_AS. [Graphical view]
PANTHER	PTHR10629. C5_DNA_meth. 1 hit.
Pfam	PF00145. DNA_methylase. 1 hit. [Graphical view]
PRINTS	PR00105. C5METTRFRASE.
TIGRFAMs	TIGR00675. dcm. 1 hit.
PROSITE	PS00094. C5_MTASE_1. 1 hit. PS00095. C5_MTASE_2. 1 hit. [Graphical view]
ProtoNet	Search...

Entry information

Entry name

MTB1_HERAU

Accession

Primary (citable) accession number: P25262

Entry history

Integrated into UniProtKB/Swiss-Prot:	May 1, 1992
Last sequence update:	May 1, 1992
Last modified:	June 16, 2009
This is version 60 of the entry and version 1 of the sequence. [Complete history]

Entry status

Reviewed (UniProtKB/Swiss-Prot)

Annotation project

HAMAP (High-quality Automated and Manual Annotation of microbial Proteomes)