3NUH - JenaLib

Asymmetric Unit (Jmol Viewer)

Biological Unit 1 (Jmol Viewer)

Title :   A DOMAIN INSERTION IN E. COLI GYRB ADOPTS A NOVEL FOLD THAT PLAYS A CRITICAL ROLE IN GYRASE FUNCTION

Authors :   A. J. Schoeffler, A. P. May, J. M. Berger

Date :   06 Jul 10 (Deposition) - 11 Aug 10 (Release) - 20 Apr 11 (Revision)

Method :   X-RAY DIFFRACTION

Resolution :   3.10

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

Keywords :   Gyrase, Topoisomerase, Supercoiling, Specialization, Isomerase (Keyword Search: [Gene Ontology, PubMed, Web (Google)] )

Reference :   A. J. Schoeffler, A. P. May, J. M. Berger
A Domain Insertion In Escherichia Coli Gyrb Adopts A Novel Fold That Plays A Critical Role In Gyrase Function.
Nucleic Acids Res. V. 38 7830 2010
PubMed-ID: 20675723 | Reference-DOI: 10.1093/NAR/GKQ665

Molecule 1 - DNA GYRASE SUBUNIT A
	Chains	:	A
	EC Number	:	5.99.1.3
	Engineered	:	YES
	Expression System	:	ESCHERICHIA COLI
	Expression System Plasmid	:	PLIC172
	Expression System Strain	:	BL21
	Expression System Taxid	:	511693
	Expression System Vector Type	:	PLASMID
	Fragment	:	UNP RESIDUES 1-525
	Gene	:	GYRA
	Organism Scientific	:	ESCHERICHIA COLI
	Organism Taxid	:	83333
	Strain	:	K-12
	Synonym	:	HISW, NALA, PARD

Molecule 2 - DNA GYRASE SUBUNIT B
	Chains	:	B
	EC Number	:	5.99.1.3
	Engineered	:	YES
	Expression System	:	ESCHERICHIA COLI
	Expression System Plasmid	:	PLIC172
	Expression System Strain	:	BL21
	Expression System Taxid	:	511693
	Expression System Vector Type	:	PLASMID
	Fragment	:	UNP RESIDUES 389-804
	Gene	:	GYRB
	Organism Scientific	:	ESCHERICHIA COLI
	Organism Taxid	:	83333
	Strain	:	K-12
	Synonym	:	ACRB, HIMB, HISU, NALC, PARA, PCBA

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

Summary Information (see also Sequences/Alignments below)

Asymmetric Unit (2, 25)

No.	Name	Count	Type	Full Name
1	MG	2	Ligand/Ion	MAGNESIUM ION
2	MSE	23	Mod. Amino Acid	SELENOMETHIONINE

Biological Unit 1 (1, 46)

No.	Name	Count	Type	Full Name
1	MG	-1	Ligand/Ion	MAGNESIUM ION
2	MSE	46	Mod. Amino Acid	SELENOMETHIONINE

(no "Site" information available for 3NUH)

(no "SS Bond" information available for 3NUH)

Asymmetric Unit

No.	Residues
1	Thr B:668	-	His B:669
2	Arg B:709	-	Gly B:710

Asymmetric Unit (11, 11)

								dbSNP	PDB
No.	Source	Variant ID	Variant			UniProt ID	Status	ID	Chain	Variant
01	UniProt	VAR_GYRA_ECOLI_001 *	A	67	S	GYRA_ECOLI	---	---	A	A	67	S
02	UniProt	VAR_GYRA_ECOLI_002 *	G	81	C	GYRA_ECOLI	---	---	A	G	81	C
03	UniProt	VAR_GYRA_ECOLI_003 *	S	83	L	GYRA_ECOLI	---	---	A	S	83	L
04	UniProt	VAR_GYRA_ECOLI_004 *	S	83	W	GYRA_ECOLI	---	---	A	S	83	W
05	UniProt	VAR_GYRA_ECOLI_005 *	A	84	P	GYRA_ECOLI	---	---	A	A	84	P
06	UniProt	VAR_GYRA_ECOLI_006 *	D	87	N	GYRA_ECOLI	---	---	A	D	87	N
07	UniProt	VAR_GYRA_ECOLI_007 *	D	87	V	GYRA_ECOLI	---	---	A	D	87	V
08	UniProt	VAR_GYRA_ECOLI_008 *	Q	106	H	GYRA_ECOLI	---	---	A	Q	106	H
09	UniProt	VAR_GYRB_ECOLI_001 *	D	426	N	GYRB_ECOLI	---	---	B	D	426	N
10	UniProt	VAR_GYRB_ECOLI_002 *	K	447	E	GYRB_ECOLI	---	---	B	K	447	E
11	UniProt	VAR_GYRB_ECOLI_003 *	W	751	R	GYRB_ECOLI	---	---	B	W	751	R
	* ID not provided by source

SNP/SAP Summary Statistics (UniProtKB/Swiss-Prot)

Biological Unit 1 (11, 22)

								dbSNP	PDB
No.	Source	Variant ID	Variant			UniProt ID	Status	ID	Chain	Variant
01	UniProt	VAR_GYRA_ECOLI_001 *	A	67	S	GYRA_ECOLI	---	---	A	A	67	S
02	UniProt	VAR_GYRA_ECOLI_002 *	G	81	C	GYRA_ECOLI	---	---	A	G	81	C
03	UniProt	VAR_GYRA_ECOLI_003 *	S	83	L	GYRA_ECOLI	---	---	A	S	83	L
04	UniProt	VAR_GYRA_ECOLI_004 *	S	83	W	GYRA_ECOLI	---	---	A	S	83	W
05	UniProt	VAR_GYRA_ECOLI_005 *	A	84	P	GYRA_ECOLI	---	---	A	A	84	P
06	UniProt	VAR_GYRA_ECOLI_006 *	D	87	N	GYRA_ECOLI	---	---	A	D	87	N
07	UniProt	VAR_GYRA_ECOLI_007 *	D	87	V	GYRA_ECOLI	---	---	A	D	87	V
08	UniProt	VAR_GYRA_ECOLI_008 *	Q	106	H	GYRA_ECOLI	---	---	A	Q	106	H
09	UniProt	VAR_GYRB_ECOLI_001 *	D	426	N	GYRB_ECOLI	---	---	B	D	426	N
10	UniProt	VAR_GYRB_ECOLI_002 *	K	447	E	GYRB_ECOLI	---	---	B	K	447	E
11	UniProt	VAR_GYRB_ECOLI_003 *	W	751	R	GYRB_ECOLI	---	---	B	W	751	R
	* ID not provided by source

SNP/SAP Summary Statistics (UniProtKB/Swiss-Prot)

Asymmetric Unit (2, 2)

	PROSITE			UniProtKB		PDB
No.	ID	AC	Description	ID	Location	Count	Location
1	TOPRIM	PS50880	Toprim domain profile.	GYRB_ECOLI	418-533	1	B:418-533
2	TOPOISOMERASE_II	PS00177	DNA topoisomerase II signature.	GYRB_ECOLI	422-430	1	B:422-430

Biological Unit 1 (2, 4)

	PROSITE			UniProtKB		PDB
No.	ID	AC	Description	ID	Location	Count	Location
1	TOPRIM	PS50880	Toprim domain profile.	GYRB_ECOLI	418-533	2	B:418-533
2	TOPOISOMERASE_II	PS00177	DNA topoisomerase II signature.	GYRB_ECOLI	422-430	2	B:422-430

(no "Exon" information available for 3NUH)

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:485
 aligned with GYRA_ECOLI | P0AES4 from UniProtKB/Swiss-Prot  Length:875

    Alignment length:506
                                    28        38        48        58        68        78        88        98       108       118       128       138       148       158       168       178       188       198       208       218       228       238       248       258       268       278       288       298       308       318       328       338       348       358       368       378       388       398       408       418       428       438       448       458       468       478       488       498       508       518      
           GYRA_ECOLI    19 SSYLDYAMSVIVGRALPDVRDGLKPVHRRVLYAMNVLGNDWNKAYKKSARVVGDVIGKYHPHGDSAVYDTIVRMAQPFSLRYMLVDGQGNFGSIDGDSAAAMRYTEIRLAKIAHELMADLEKETVDFVDNYDGTEKIPDVMPTKIPNLLVNGSSGIAVGMATNIPPHNLTEVINGCLAYIDDEDISIEGLMEHIPGPDFPTAAIINGRRGIEEAYRTGRGKVYIRARAEVEVDAKTGRETIIVHEIPYQVNKARLIEKIAELVKEKRVEGISALRDESDKDGMRIVIEVKRDAVGEVVLNNLYSQTQLQVSFGINMVALHHGQPKIMNLKDIIAAFVRHRREVVTRRTIFELRKARDRAHILEALAVALANIDPIIELIRHAPTPAEAKTALVANPWQLGNVAAMLERAGDDAARPEWLEPEFGVRDGLYYLTEQQAQAILDLRLQKLTGLEHEKLLDEYKELLDQIAELLRILGSADRLMEVIREELELVREQFGDKRRTEITAN 524
               SCOP domains d3nuha_ A: DNA Gyrase A                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                    SCOP domains
               CATH domains -------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------- CATH domains
               Pfam domains -------------DNA_topoisoIV-3nuhA01 A:32-507                                                                                                                                                                                                                                                                                                                                                                                                                                                              ----------------- Pfam domains
         Sec.struct. author .hhhhhhhhhhhhhhh.......hhhhhhhhhhhhhhh.......eehhhhhhhhhhhh...hhhhhhhhhhhh..........eeee.................eeee..hhhhhh.........eee......eee.......hhhhhh.ee..----..ee...hhhhhhhhhhhhhhh...hhhhhh............ee..hhhhhhhhhhheeeeeee.eeeee..----.eeeeeee.....hhhhhhhhhhhhhhhh....eeeeee........eeeee....hhhhhhhhhhhhh..eeeeeee.eee....eee.hhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhh.hhhhhhhhhhhh..----hhhhhh----............-----....hhhhhhhhhhh.hhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhh......ee... Sec.struct. author
             SAPs(SNPs) (1) ------------------------------------------------S-------------C-LP--N------------------H---------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------- SAPs(SNPs) (1)
             SAPs(SNPs) (2) ----------------------------------------------------------------W---V----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------- SAPs(SNPs) (2)
                    PROSITE -------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------- PROSITE
                 Transcript -------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------- Transcript
                 3nuh A  19 SSYLDYAmSVIVGRALPDVRDGLKPVHRRVLYAmNVLGNDWNKAYKKSARVVGDVIGKYHPHGDSAVYDTIVRmAQPFSLRYmLVDGQGNFGSIDGDSAAAmRYTEIRLAKIAHELmADLEKETVDFVDNYDGTEKIPDVmPTKIPNLLVNGSSGI----ATNIPPHNLTEVINGCLAYIDDEDISIEGLmEHIPGPDFPTAAIINGRRGIEEAYRTGRGKVYIRARAEVEVD----RETIIVHEIPYQVNKARLIEKIAELVKEKRVEGISALRDESDKDGmRIVIEVKRDAVGEVVLNNLYSQTQLQVSFGINmVALHHGQPKImNLKDIIAAFVRHRREVVTRRTIFELRKARDRAHILEALAVALANIDPIIELIRHAPTPAEAKTALVANPW----VAAmLE----DAARPEWLEPEF-----LYYLTEQQAQAILDLRLQKLTGLEHEKLLDEYKELLDQIAELLRILGSADRLmEVIREELELVREQFGDKRRTEITAN 524
                                   |28        38        48   |    58        68        78        88   |    98  |    108       118 |     128      |138       148       158|      168     |   -|      188       198       208|      218       228       238       248  |    258       268       278       288       298  |    308       318       328     | 338      |348       358       368       378       388       398       408      |  - |  | |  - |     438  |    448       458       468       478       488       498|      508       518      
                                  26-MSE                    52-MSE                                  92-MSE  101-MSE            120-MSE        135-MSE                 159-MSE        174  179                           209-MSE                                   251  256                                          301-MSE                          334-MSE    345-MSE                                                               415  420  | |  430        441   447                                                 499-MSE                     
                                                                                                                                                                                                                                                                                                                                                                                                                                              423-MSE                                                                                                 
                                                                                                                                                                                                                                                                                                                                                                                                                                                425

Chain B from PDB  Type:PROTEIN  Length:354
 aligned with GYRB_ECOLI | P0AES6 from UniProtKB/Swiss-Prot  Length:804

    Alignment length:383
                                   411       421       431       441       451       461       471       481       491       501       511       521       531       541       551       561       571       581       591       601       611       621       631       641       651       661       671       681       691       701       711       721       731       741       751       761       771       781   
           GYRB_ECOLI   402 GLPGKLADCQERDPALSELYLVEGDSAGGSAKQGRNRKNQAILPLKGKILNVEKARFDKMLSSQEVATLITALGCGIGRDEYNPDKLRYHSIIIMTDADVDGSHIRTLLLTFFYRQMPEIVERGHVYIAQPPLYKVKKGKQEQYIKDDEAMDQYQISIALDGATLHTNASAPALAGEALEKLVSEYNATQKMINRMERRYPKAMLKELIYQPTLTEADLSDEQTVTRWVNALVSELNDKEQHGSQWKFDVHTNAEQNLFEPIVRVRTHGVDTDYPLDHEFITGGEYRRICTLGEKLRGLLEEDAFIERGERRQPVASFEQALDWLVKESRRGLSIQRYKGLGEMNPEQLWETTMDPESRRMLRVTVKDAIAADQLFTTLMGDA 784
               SCOP domains d3nuhb1 B:402-561,B:733-784 DNA gyrase beta-pri             me domain                                                                                           d3nuhb2 B:562-732 DNA gyrase beta-prime insert domain                                                                                                                      d3nuhb1 B:402-561,B:733-784                          SCOP domains
               CATH domains ----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------- CATH domains
               Pfam domains -----------------Toprim-3nuhB01 B:419-532                                                                                          ---------------------------------------------------------------------------------------------------------------------------   ----------------------------------------------------------------------DNA_gyraseB_C-3nuhB02 B:729-784                          Pfam domains
         Sec.struct. author .................eeeeeehhhhhhhhhhhh....eeeeee..-------------..hhhhhhhhhhhh-------------...eeee........hhhhhhhhhhhhhhhhhhhhh..eeee....eeeee..eeeee.hhhhhhhhhhhhhhh.eeeee.....eeehhhhhhhhhhhhhhhhhhhhh....hhhhhhhhhhh...hhhhhhhhhhhhhhhhhhhhhhhhhh....eeeeeeee..---.eeeeeeee....eeeee.hhhhhhhhhhhhhhhhhhhhhhh....eeeee...eeee.hhhhhhhhhhhhhh...eeee..hhhhhhhhhhhhhhh......eee.hhhhhhhhhhhhhhhh... Sec.struct. author
                 SAPs(SNPs) ------------------------N--------------------E---------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------R--------------------------------- SAPs(SNPs)
                PROSITE (1) ----------------TOPRIM  PDB: B:418-533 UniProt: 418-533                                                                             ----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------- PROSITE (1)
                PROSITE (2) --------------------TOPOISOME------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------ PROSITE (2)
                 Transcript ----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------- Transcript
                 3nuh B 402 GLPGKLADCQERDPALSELYLVEGDSAGGSAKQGRNRKNQAILPLKG-------------LSSQEVATLITALG-------------RYHSIIImTDADVDGSHIRTLLLTFFYRQmPEIVERGHVYIAQPPLYKVKKGKQEQYIKDDEAmDQYQISIALDGATLHTNASAPALAGEALEKLVSEYNATQKmINRmERRYPKAmLKELIYQPTLTEADLSDEQTVTRWVNALVSELNDKEQHGSQWKFDVHTNA---LFEPIVRVRTHGVDTDYPLDHEFITGGEYRRICTLGEKLRGLLEEDAFIERGERRQPVASFEQALDWLVKESRRGLSIQRYKGLGEmNPEQLWETTmDPESRRmLRVTVKDAIAADQLFTTLmGDA 784
                                   411       421       431       441      |  -         -|      471   |     -       491    |  501       511      |521       531       541       551|      561       571       581       591 |   | 601   |   611       621       631       641       651   |   661       671       681       691       701       711       721       731       741   |   751   |   761|      771       781   
                                                                        448           462          475           489      |                   518-MSE                           552-MSE                                  593-MSE     605-MSE                                           655 659                                                                                   745-MSE   755-MSE  |                781-MSE
                                                                                                                        496-MSE                                                                                              597-MSE                                                                                                                                                              762-MSE

Legend:		→ Mismatch	(orange background)
	-	→ Gap	(green background, '-', border residues have a numbering label)
		→ Modified Residue	(blue background, lower-case, 'x' indicates undefined single-letter code, labelled with number + name)
	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 "CATH Domain" information available for 3NUH)

Asymmetric Unit(hide GO term definitions)

Chain A (GYRA_ECOLI | P0AES4)

molecular function
	GO:0005524	ATP binding	Interacting selectively and non-covalently with ATP, adenosine 5'-triphosphate, a universally important coenzyme and enzyme regulator.
	GO:0003677	DNA binding	Any molecular function by which a gene product interacts selectively and non-covalently with DNA (deoxyribonucleic acid).
	GO:0034335	DNA supercoiling activity	Catalytic introduction of supercoils in a DNA molecule or region thereof. In bacteria, negative supercoils are only introduced by DNA gyrase, a type II topoisomerase, but not all DNA gyrases are capable of introducing supercoils. In bacteria, the level of supercoiling varies widely between species and has been characterized properly in only a handful of organisms. The best characterized enzyme, from E.coli, is exceptionally proficient at supercoiling and this ability is not representative of all bacteria.
	GO:0003916	DNA topoisomerase activity	Catalysis of the transient cleavage and passage of individual DNA strands or double helices through one another, resulting a topological transformation in double-stranded DNA.
	GO:0003918	DNA topoisomerase type II (ATP-hydrolyzing) activity	Catalysis of a DNA topological transformation by transiently cleaving a pair of complementary DNA strands to form a gate through which a second double-stranded DNA segment is passed, after which the severed strands in the first DNA segment are rejoined; product release is coupled to ATP binding and hydrolysis; changes the linking number in multiples of 2.
	GO:0008094	DNA-dependent ATPase activity	Catalysis of the reaction: ATP + H2O = ADP + phosphate; this reaction requires the presence of single- or double-stranded DNA, and it drives another reaction.
	GO:0042802	identical protein binding	Interacting selectively and non-covalently with an identical protein or proteins.
	GO:0016853	isomerase activity	Catalysis of the geometric or structural changes within one molecule. Isomerase is the systematic name for any enzyme of EC class 5.
	GO:0000166	nucleotide binding	Interacting selectively and non-covalently with a nucleotide, any compound consisting of a nucleoside that is esterified with (ortho)phosphate or an oligophosphate at any hydroxyl group on the ribose or deoxyribose.
	GO:0005515	protein binding	Interacting selectively and non-covalently with any protein or protein complex (a complex of two or more proteins that may include other nonprotein molecules).
biological process
	GO:0006259	DNA metabolic process	Any cellular metabolic process involving deoxyribonucleic acid. This is one of the two main types of nucleic acid, consisting of a long, unbranched macromolecule formed from one, or more commonly, two, strands of linked deoxyribonucleotides.
	GO:0006265	DNA topological change	The process in which a transformation is induced in the topological structure of a double-stranded DNA helix, resulting in a change in linking number.
	GO:0006268	DNA unwinding involved in DNA replication	The process in which interchain hydrogen bonds between two strands of DNA are broken or 'melted', generating unpaired template strands for DNA replication.
	GO:0006261	DNA-dependent DNA replication	A DNA replication process that uses parental DNA as a template for the DNA-dependent DNA polymerases that synthesize the new strands.
	GO:0007059	chromosome segregation	The process in which genetic material, in the form of chromosomes, is organized into specific structures and then physically separated and apportioned to two or more sets. In eukaryotes, chromosome segregation begins with the condensation of chromosomes, includes chromosome separation, and ends when chromosomes have completed movement to the spindle poles.
	GO:0046677	response to antibiotic	Any process that results in a change in state or activity of a cell or an organism (in terms of movement, secretion, enzyme production, gene expression, etc.) as a result of an antibiotic stimulus. An antibiotic is a chemical substance produced by a microorganism which has the capacity to inhibit the growth of or to kill other microorganisms.
	GO:0042493	response to drug	Any process that results in a change in state or activity of a cell or an organism (in terms of movement, secretion, enzyme production, gene expression, etc.) as a result of a drug stimulus. A drug is a substance used in the diagnosis, treatment or prevention of a disease.
	GO:0006351	transcription, DNA-templated	The cellular synthesis of RNA on a template of DNA.
cellular component
	GO:0009330	DNA topoisomerase complex (ATP-hydrolyzing)	Complex that possesses DNA topoisomerase (ATP-hydrolyzing) activity.
	GO:0005694	chromosome	A structure composed of a very long molecule of DNA and associated proteins (e.g. histones) that carries hereditary information.
	GO:0005737	cytoplasm	All of the contents of a cell excluding the plasma membrane and nucleus, but including other subcellular structures.
	GO:0005829	cytosol	The part of the cytoplasm that does not contain organelles but which does contain other particulate matter, such as protein complexes.
	GO:0016020	membrane	A lipid bilayer along with all the proteins and protein complexes embedded in it an attached to it.
	GO:0009295	nucleoid	The region of a virus, bacterial cell, mitochondrion or chloroplast to which the nucleic acid is confined.

Chain B (GYRB_ECOLI | P0AES6)

molecular function
	GO:0005524	ATP binding	Interacting selectively and non-covalently with ATP, adenosine 5'-triphosphate, a universally important coenzyme and enzyme regulator.
	GO:0003677	DNA binding	Any molecular function by which a gene product interacts selectively and non-covalently with DNA (deoxyribonucleic acid).
	GO:0034335	DNA supercoiling activity	Catalytic introduction of supercoils in a DNA molecule or region thereof. In bacteria, negative supercoils are only introduced by DNA gyrase, a type II topoisomerase, but not all DNA gyrases are capable of introducing supercoils. In bacteria, the level of supercoiling varies widely between species and has been characterized properly in only a handful of organisms. The best characterized enzyme, from E.coli, is exceptionally proficient at supercoiling and this ability is not representative of all bacteria.
	GO:0003916	DNA topoisomerase activity	Catalysis of the transient cleavage and passage of individual DNA strands or double helices through one another, resulting a topological transformation in double-stranded DNA.
	GO:0003918	DNA topoisomerase type II (ATP-hydrolyzing) activity	Catalysis of a DNA topological transformation by transiently cleaving a pair of complementary DNA strands to form a gate through which a second double-stranded DNA segment is passed, after which the severed strands in the first DNA segment are rejoined; product release is coupled to ATP binding and hydrolysis; changes the linking number in multiples of 2.
	GO:0008094	DNA-dependent ATPase activity	Catalysis of the reaction: ATP + H2O = ADP + phosphate; this reaction requires the presence of single- or double-stranded DNA, and it drives another reaction.
	GO:0016853	isomerase activity	Catalysis of the geometric or structural changes within one molecule. Isomerase is the systematic name for any enzyme of EC class 5.
	GO:0000287	magnesium ion binding	Interacting selectively and non-covalently with magnesium (Mg) ions.
	GO:0046872	metal ion binding	Interacting selectively and non-covalently with any metal ion.
	GO:0000166	nucleotide binding	Interacting selectively and non-covalently with a nucleotide, any compound consisting of a nucleoside that is esterified with (ortho)phosphate or an oligophosphate at any hydroxyl group on the ribose or deoxyribose.
	GO:0005515	protein binding	Interacting selectively and non-covalently with any protein or protein complex (a complex of two or more proteins that may include other nonprotein molecules).
biological process
	GO:0006265	DNA topological change	The process in which a transformation is induced in the topological structure of a double-stranded DNA helix, resulting in a change in linking number.
	GO:0006268	DNA unwinding involved in DNA replication	The process in which interchain hydrogen bonds between two strands of DNA are broken or 'melted', generating unpaired template strands for DNA replication.
	GO:0006261	DNA-dependent DNA replication	A DNA replication process that uses parental DNA as a template for the DNA-dependent DNA polymerases that synthesize the new strands.
	GO:0007059	chromosome segregation	The process in which genetic material, in the form of chromosomes, is organized into specific structures and then physically separated and apportioned to two or more sets. In eukaryotes, chromosome segregation begins with the condensation of chromosomes, includes chromosome separation, and ends when chromosomes have completed movement to the spindle poles.
	GO:0046677	response to antibiotic	Any process that results in a change in state or activity of a cell or an organism (in terms of movement, secretion, enzyme production, gene expression, etc.) as a result of an antibiotic stimulus. An antibiotic is a chemical substance produced by a microorganism which has the capacity to inhibit the growth of or to kill other microorganisms.
	GO:0042493	response to drug	Any process that results in a change in state or activity of a cell or an organism (in terms of movement, secretion, enzyme production, gene expression, etc.) as a result of a drug stimulus. A drug is a substance used in the diagnosis, treatment or prevention of a disease.
	GO:0006351	transcription, DNA-templated	The cellular synthesis of RNA on a template of DNA.
cellular component
	GO:0009330	DNA topoisomerase complex (ATP-hydrolyzing)	Complex that possesses DNA topoisomerase (ATP-hydrolyzing) activity.
	GO:0005694	chromosome	A structure composed of a very long molecule of DNA and associated proteins (e.g. histones) that carries hereditary information.
	GO:0005737	cytoplasm	All of the contents of a cell excluding the plasma membrane and nucleus, but including other subcellular structures.
	GO:0005829	cytosol	The part of the cytoplasm that does not contain organelles but which does contain other particulate matter, such as protein complexes.
	GO:0009295	nucleoid	The region of a virus, bacterial cell, mitochondrion or chloroplast to which the nucleic acid is confined.

Asymmetric Unit
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	Sites
(no "Sites" information available for 3nuh)

	Cis Peptide Bonds
		Arg B:709 - Gly B:710	[ RasMol ]
		Thr B:668 - His B:669	[ RasMol ]

Biological Unit
	Complete Structure
		Biological Unit 1	[ Jena3D ]

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	3nuh
		Family and Domain Information	:	ProDom \| SYSTERS
		General Structural Information	:	GlycoscienceDB \| MMDB \| NDB \| OCA \| PDB \| PDBe \| PDBj \| PDBsum \| PDBWiki \| PQS \| PROTEOPEDIA
		Orientation in Membranes	:	OPM
		Protein Surface	:	SURFACE
		Secondary Structure	:	DSSP (structure derived) \| HSSP (homology derived)
		Structural Genomics	:	GeneCensus
		Structural Neighbours	:	CE \| VAST
		Structure Classification	:	CATH \| Dali \| SCOP
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	GYRA_ECOLI \| P0AES4
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	GYRB_ECOLI \| P0AES6
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		Protein-protein Interaction	:	DIP
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	5.99.1.3
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		Protein Disorder Prediction	:	DisEMBL \| FoldIndex \| GLOBPLOT (for more information see DisProt)

(no "Related Entries Specified in the PDB File" available for 3NUH)

Description

Compounds

Structural Features

Chains, Units

Ligands, Modified Residues, Ions (2, 25)

Sites (0, 0)

SS Bonds (0, 0)

Cis Peptide Bonds (2, 2)

Sequence-Structure Mapping

SAPs(SNPs)/Variants (11, 11)

PROSITE Motifs (2, 2)

Exons (0, 0)

Sequences/Alignments

Classification and Annotation

SCOP Domains (3, 3)

CATH Domains (0, 0)

Pfam Domains (3, 3)

Gene Ontology (26, 47)

Visualization

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Still Images

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Databases

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Related Entries

Entries Sharing at Least One Protein Chain (UniProt ID)

Related Entries Specified in the PDB File