2ADM - JenaLib

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Title :   ADENINE-N6-DNA-METHYLTRANSFERASE TAQI

Authors :   G. Schluckebier, W. Saenger

Date :   15 Jul 96 (Deposition) - 27 Jan 97 (Release) - 24 Feb 09 (Revision)

Method :   X-RAY DIFFRACTION

Resolution :   2.60

Chains :   Asym. Unit : A,B
Biol. Unit 1: A  (1x)
Biol. Unit 2: B  (1x)

Keywords :   Transferase, Methyltransferase, Restriction System (Keyword Search: [Gene Ontology, PubMed, Web (Google)] )

Reference :   G. Schluckebier, M. Kozak, N. Bleimling, E. Weinhold, W. Saenger
Differential Binding Of S-Adenosylmethionine S-Adenosylhomocysteine And Sinefungin To The Adenine-Specific Dna Methyltransferase M. Taqi.
J. Mol. Biol. V. 265 56 1997
PubMed-ID: 8995524 | Reference-DOI: 10.1006/JMBI.1996.0711
(for further references see the PDB file header)

Molecule 1 - ADENINE-N6-DNA-METHYLTRANSFERASE TAQI
	Chains	:	A, B
	EC Number	:	2.1.1.72
	Engineered	:	YES
	Expression System	:	ESCHERICHIA COLI
	Expression System Plasmid	:	PPR594
	Expression System Strain	:	ER1821
	Expression System Taxid	:	562
	Gene	:	TAQ
	Organism Scientific	:	THERMUS AQUATICUS
	Organism Taxid	:	271
	Other Details	:	S-ADENOSYL-METHIONINE AS LIGAND

		1	2
Asymmetric Unit	:	A	B
Biological Unit 1 (1x)	:	A
Biological Unit 2 (1x)	:		B

Summary Information (see also Sequences/Alignments below)

Asymmetric Unit (1, 2)

No.	Name	Count	Type	Full Name
1	SAM	2	Ligand/Ion	S-ADENOSYLMETHIONINE

Biological Unit 1 (1, 1)

No.	Name	Count	Type	Full Name
1	SAM	1	Ligand/Ion	S-ADENOSYLMETHIONINE

Biological Unit 2 (1, 1)

No.	Name	Count	Type	Full Name
1	SAM	1	Ligand/Ion	S-ADENOSYLMETHIONINE

Asymmetric Unit (2, 2)

No.	Name	Evidence	Residues	Description
1	AC1	SOFTWARE	THR A:23 , GLU A:45 , ALA A:47 , CYS A:48 , PRO A:52 , GLU A:71 , ILE A:72 , ALA A:88 , ASP A:89 , PHE A:90 , ASN A:105 , PRO A:107 , PHE A:146 , HOH A:1661	BINDING SITE FOR RESIDUE SAM A 500
2	AC2	SOFTWARE	THR B:23 , GLU B:45 , ALA B:47 , CYS B:48 , GLU B:71 , ILE B:72 , ASP B:89 , PHE B:90 , ASN B:105 , PRO B:107	BINDING SITE FOR RESIDUE SAM B 500

(no "SS Bond" information available for 2ADM)

(no "Cis Peptide Bond" information available for 2ADM)

(no "SAP(SNP)/Variant" information available for 2ADM)

Asymmetric Unit (1, 2)

	PROSITE			UniProtKB		PDB
No.	ID	AC	Description	ID	Location	Count	Location
1	N6_MTASE	PS00092	N-6 Adenine-specific DNA methylases signature.	MTTA_THEAQ	102-108	2	A:102-108 B:102-108

Biological Unit 1 (1, 1)

	PROSITE			UniProtKB		PDB
No.	ID	AC	Description	ID	Location	Count	Location
1	N6_MTASE	PS00092	N-6 Adenine-specific DNA methylases signature.	MTTA_THEAQ	102-108	1	A:102-108 -

Biological Unit 2 (1, 1)

	PROSITE			UniProtKB		PDB
No.	ID	AC	Description	ID	Location	Count	Location
1	N6_MTASE	PS00092	N-6 Adenine-specific DNA methylases signature.	MTTA_THEAQ	102-108	1	- B:102-108

(no "Exon" information available for 2ADM)

Asymmetric Unit

Reformat:	Number of residues per line = ('0' or empty: single-line sequence representation)
	Number of residues per labelling interval =
	UniProt sequence: complete aligned part

Show mapping:	SCOP domains	CATH domains	Pfam domains	Secondary structure (by author)
	SAPs(SNPs)	PROSITE motifs	Exons
	(details for a mapped element are shown in a popup box when the mouse pointer rests over it)

Chain A from PDB  Type:PROTEIN  Length:385
 aligned with MTTA_THEAQ | P14385 from UniProtKB/Swiss-Prot  Length:421

    Alignment length:393
                                    30        40        50        60        70        80        90       100       110       120       130       140       150       160       170       180       190       200       210       220       230       240       250       260       270       280       290       300       310       320       330       340       350       360       370       380       390       400       410   
           MTTA_THEAQ    21 VETPPEVVDFMVSLAEAPRGGRVLEPACAHGPFLRAFREAHGTAYRFVGVEIDPKALDLPPWAEGILADFLLWEPGEAFDLILGNPPYGIVGEASKYPIHVFKAVKDLYKKAFSTWKGKYNLYGAFLEKAVRLLKPGGVLVFVVPATWLVLEDFALLREFLAREGKTSVYYLGEVFPQKKVSAVVIRFQKSGKGLSLWDTQESESGFTPILWAEYPHWEGEIIRFETEETRKLEISGMPLGDLFHIRFAARSPEFKKHPAVRKEPGPGLVPVLTGRNLKPGWVDYEKNHSGLWMPKERAKELRDFYATPHLVVAHTKGTRVVAAWDERAYPWREEFHLLPKEGVRLDPSSLVQWLNSEAMQKHVRTLYRDFVPHLTLRMLERLPVRREYGFHT 413
               SCOP domains d2adma1 A:21-243 DNA methylase TaqI, N-terminal domain                                                                                                                                                                         d2adma2 A:244-413 DNA methylase TaqI, C-terminal domain                                                                                                                    SCOP domains
               CATH domains 2admA01 A:21-243 Vaccinia Virus protein VP39                                                                                                                                                                                   2admA02 A:244-412 Adenine-n6-DNA-methyltransferase Taqi, Chain A, domain 2                                                                                               - CATH domains
               Pfam domains --------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------- Pfam domains
         Sec.struct. author ....hhhhhhhhhh.......eeeee.....hhhhhhhhhh....eeeeee............eeee.............eeeee.......--------.hhhhhhhhhhh.........hhhhhhhhhhhh.....eeeeeeehhhh..hhhhhhhhhhhhh.eeeeeeee.........eeeeeee.....eeeeeeeee..eeeeeeeeee............hhhhhhhh.eeehhhheeeee...hhhhh............eee...hhh...............eeehhhhhh..hhhh..eeee.........eeee.........eeeee...eee.hhhhhhhh..hhhhhhhhhhh........hhhhhh.eee...eee. Sec.struct. author
                 SAPs(SNPs) --------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------- SAPs(SNPs)
                    PROSITE ---------------------------------------------------------------------------------N6_MTAS----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------- PROSITE
                 Transcript --------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------- Transcript
                 2adm A  21 VETPPEVVDFMVSLAEAPRGGRVLEPACAHGPFLRAFREAHGTGYRFVGVEIDPKALDLPPWAEGILADFLLWEPGEAFDLILGNPPYGIVG--------VFKAVKDLYKKAFSTWKGKYNLYGAFLEKAVRLLKPGGVLVFVVPATWLVLEDFALLREFLAREGKTSVYYLGEVFPQKKVSAVVIRFQKSGKGLSLWDTQESESGFTPILWAEYPHWEGEIIRFETEETRKLEISGMPLGDLFHIRFAARSPEFKKHPAVRKEPGPGLVPVLTGRNLKPGWVDYEKNHSGLWMPKERAKELRDFYATPHLVVAHTKGTRVVAAWDERAYPWREEFHLLPKEGVRLDPSTLVQWLNSEAMQKHVRTLYRDFVPHLTLRMLERLPVRREYGFHT 413
                                    30        40        50        60        70        80        90       100       110 |       -|      130       140       150       160       170       180       190       200       210       220       230       240       250       260       270       280       290       300       310       320       330       340       350       360       370       380       390       400       410   
                                                                                                                     112      121

Chain B from PDB  Type:PROTEIN  Length:385
 aligned with MTTA_THEAQ | P14385 from UniProtKB/Swiss-Prot  Length:421

    Alignment length:393
                                    30        40        50        60        70        80        90       100       110       120       130       140       150       160       170       180       190       200       210       220       230       240       250       260       270       280       290       300       310       320       330       340       350       360       370       380       390       400       410   
           MTTA_THEAQ    21 VETPPEVVDFMVSLAEAPRGGRVLEPACAHGPFLRAFREAHGTAYRFVGVEIDPKALDLPPWAEGILADFLLWEPGEAFDLILGNPPYGIVGEASKYPIHVFKAVKDLYKKAFSTWKGKYNLYGAFLEKAVRLLKPGGVLVFVVPATWLVLEDFALLREFLAREGKTSVYYLGEVFPQKKVSAVVIRFQKSGKGLSLWDTQESESGFTPILWAEYPHWEGEIIRFETEETRKLEISGMPLGDLFHIRFAARSPEFKKHPAVRKEPGPGLVPVLTGRNLKPGWVDYEKNHSGLWMPKERAKELRDFYATPHLVVAHTKGTRVVAAWDERAYPWREEFHLLPKEGVRLDPSSLVQWLNSEAMQKHVRTLYRDFVPHLTLRMLERLPVRREYGFHT 413
               SCOP domains d2admb1 B:21-243 DNA methylase TaqI, N-terminal domain                                                                                                                                                                         d2admb2 B:244-413 DNA methylase TaqI, C-terminal domain                                                                                                                    SCOP domains
               CATH domains 2admB01 B:21-243 Vaccinia Virus protein VP39                                                                                                                                                                                   2admB02 B:244-412 Adenine-n6-DNA-methyltransferase Taqi, Chain A, domain 2                                                                                               - CATH domains
               Pfam domains --------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------- Pfam domains
         Sec.struct. author ....hhhhhhhhhh.......eeeee.....hhhhhhhhhh....eeeeee...........eeeee.............eeeee.......--------.hhhhhhhhhhh.........hhhhhhhhhhhh.....eeeeeeehhhh..hhhhhhhhhhhhh.eeeeeeee.........eeeeeee.....eeeeeeeee..eeeeeeeeee............hhhhhhhh.eeehhhheeeee...hhhhh............eee.....................eeehhhhhh..hhhh..eeee.........eeee.........eeeee...eee.hhhhhhhh..hhhhhhhhhhh........hhhhhh.eee...eee. Sec.struct. author
                 SAPs(SNPs) --------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------- SAPs(SNPs)
                    PROSITE ---------------------------------------------------------------------------------N6_MTAS----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------- PROSITE
                 Transcript --------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------- Transcript
                 2adm B  21 VETPPEVVDFMVSLAEAPRGGRVLEPACAHGPFLRAFREAHGTGYRFVGVEIDPKALDLPPWAEGILADFLLWEPGEAFDLILGNPPYGIVG--------VFKAVKDLYKKAFSTWKGKYNLYGAFLEKAVRLLKPGGVLVFVVPATWLVLEDFALLREFLAREGKTSVYYLGEVFPQKKVSAVVIRFQKSGKGLSLWDTQESESGFTPILWAEYPHWEGEIIRFETEETRKLEISGMPLGDLFHIRFAARSPEFKKHPAVRKEPGPGLVPVLTGRNLKPGWVDYEKNHSGLWMPKERAKELRDFYATPHLVVAHTKGTRVVAAWDERAYPWREEFHLLPKEGVRLDPSTLVQWLNSEAMQKHVRTLYRDFVPHLTLRMLERLPVRREYGFHT 413
                                    30        40        50        60        70        80        90       100       110 |       -|      130       140       150       160       170       180       190       200       210       220       230       240       250       260       270       280       290       300       310       320       330       340       350       360       370       380       390       400       410   
                                                                                                                     112      121

Legend:		→ Mismatch	(orange background)
	-	→ Gap	(green background, '-', border residues have a numbering label)
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	x	→ Chemical Group	(purple background, 'x', labelled with number + name, e.g. ACE or NH2)
	extra numbering lines below/above indicate numbering irregularities and modified residue names etc., number ends below/above '\|'

(no "Pfam Domain" information available for 2ADM)

Asymmetric Unit(hide GO term definitions)

Chain A,B (MTTA_THEAQ | P14385)

molecular function
	GO:0003677	DNA binding	Any molecular function by which a gene product interacts selectively and non-covalently with DNA (deoxyribonucleic acid).
	GO:0003824	catalytic activity	Catalysis of a biochemical reaction at physiological temperatures. In biologically catalyzed reactions, the reactants are known as substrates, and the catalysts are naturally occurring macromolecular substances known as enzymes. Enzymes possess specific binding sites for substrates, and are usually composed wholly or largely of protein, but RNA that has catalytic activity (ribozyme) is often also regarded as enzymatic.
	GO:0008168	methyltransferase activity	Catalysis of the transfer of a methyl group to an acceptor molecule.
	GO:0003676	nucleic acid binding	Interacting selectively and non-covalently with any nucleic acid.
	GO:0009007	site-specific DNA-methyltransferase (adenine-specific) activity	Catalysis of the reaction: S-adenosyl-L-methionine + DNA adenine = S-adenosyl-L-homocysteine + DNA 6-methylaminopurine.
	GO:0016740	transferase activity	Catalysis of the transfer of a group, e.g. a methyl group, glycosyl group, acyl group, phosphorus-containing, or other groups, from one compound (generally regarded as the donor) to another compound (generally regarded as the acceptor). Transferase is the systematic name for any enzyme of EC class 2.
biological process
	GO:0032775	DNA methylation on adenine	The covalent transfer of a methyl group to N-6 of adenine in a DNA molecule.
	GO:0006304	DNA modification	The covalent alteration of one or more nucleotide sites in DNA, resulting in a change in its properties.
	GO:0009307	DNA restriction-modification system	A defense process found in many bacteria and archaea that protects the organism from invading foreign DNA by cleaving it with a restriction endonuclease. The organism's own DNA is protected by methylation of a specific nucleotide, which occurs immediately following replication, in the same target site as the restriction enzyme.
	GO:0032259	methylation	The process in which a methyl group is covalently attached to a molecule.

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