A0A011NI90 · A0A011NI90_9PROT

Function

function

A type II topoisomerase that negatively supercoils closed circular double-stranded (ds) DNA in an ATP-dependent manner to modulate DNA topology and maintain chromosomes in an underwound state. Negative supercoiling favors strand separation, and DNA replication, transcription, recombination and repair, all of which involve strand separation. Also able to catalyze the interconversion of other topological isomers of dsDNA rings, including catenanes and knotted rings. Type II topoisomerases break and join 2 DNA strands simultaneously in an ATP-dependent manner.

Miscellaneous

Few gyrases are as efficient as E.coli at forming negative supercoils. Not all organisms have 2 type II topoisomerases; in organisms with a single type II topoisomerase this enzyme also has to decatenate newly replicated chromosomes.

Caution

The sequence shown here is derived from an EMBL/GenBank/DDBJ whole genome shotgun (WGS) entry which is preliminary data.

Catalytic activity

  • ATP-dependent breakage, passage and rejoining of double-stranded DNA.
    EC:5.6.2.2 (UniProtKB | ENZYME | Rhea)

Features

Showing features for active site.

TypeIDPosition(s)Description
Active site122O-(5'-phospho-DNA)-tyrosine intermediate

GO annotations

AspectTerm
Cellular Componentchromosome
Cellular Componentcytoplasm
Cellular ComponentDNA topoisomerase type II (double strand cut, ATP-hydrolyzing) complex
Molecular FunctionATP binding
Molecular FunctionDNA binding
Molecular FunctionDNA negative supercoiling activity
Biological ProcessDNA topological change
Biological ProcessDNA-templated DNA replication

Keywords

Enzyme and pathway databases

Names & Taxonomy

Protein names

  • Recommended name
    DNA gyrase subunit A
  • EC number

Gene names

    • Name
      gyrA
    • ORF names
      AW10_00581

Organism names

Accessions

  • Primary accession
    A0A011NI90

Proteomes

Subcellular Location

Keywords

Interaction

Subunit

Heterotetramer, composed of two GyrA and two GyrB chains. In the heterotetramer, GyrA contains the active site tyrosine that forms a transient covalent intermediate with DNA, while GyrB binds cofactors and catalyzes ATP hydrolysis.

Protein-protein interaction databases

Family & Domains

Features

Showing features for domain, motif, region, compositional bias.

Type
IDPosition(s)Description
Domain11-499DNA topoisomerase type IIA
Motif560-566GyrA-box
Region841-880Disordered
Compositional bias863-880Acidic residues

Sequence similarities

Belongs to the type II topoisomerase GyrA/ParC subunit family.

Family and domain databases

Sequence

  • Sequence status
    Complete
  • Length
    880
  • Mass (Da)
    97,298
  • Last updated
    2014-06-11 v1
  • Checksum
    19E4A6E56D621754
MEAFAKETLPISLEDEMRRSYLDYAMSVIVGRALPDARDGLKPVHRRVLFAMHELSNDWNKPYKKSARIVGDVIGKYHPHGDIAVYDTIVRMAQNFSLRYMLVDGQGNFGSVDGDNAAAMRYTEVRMARIGHELLADIDKETVDFGPNYDGSEQEPLVMPARIPNLLINGSSGIAVGMATNIPPHNLGEVVDACLALLGNPEATIDELIALMPAPDFPTAGIIYGIAGVCEGYRTGRGRVVMRGRTHFEDLERGNRQAIIIDELPYQVNKRTLLEKIGELVNDKRIDGISDLRDESDKSGMRVVIELKRGEVAEVVLNCLYKQTQLQDTFGMNMVALVDGQPRLLNLKQMLECFLWHRREVLTRRTVFELRKARERAHIQEGLAVALDNVDEIIALIKASPTPADARRALMARPWQSPTVAEMLRRANLDATRPDGVGLEFGLSESGYLLSEAQAQAILELRLQRLTGLERDKIVTDFGELLARIADLMDILARPERITEMIVEELTGIRAQFGDKRRSEIVISTQDLGIADFITPVDMVVTLSRTGYIKSQPLADYRAQRRGGRGKQAAAMKTDDFVDRLFVANTHDSILCFTNRGRVYWLKVYEVPQGTRTSRGKPVVNVFPFEDGEKISAILPIKEFVDDRYIFMATSQGTVKKTPLSDFSNPRKNGIIAVALDEEDFLIGAEVTNGSQDVILVSDAGKAVWFDEEDVRPMGRTARGVRGMRLGDKQQALSLLIADSDQQTVLVATENGFGKRTALADFRHSGRGTQGVIAIAASERNGKVVAARLVSDDDEIMLITTGGVLIRTRVREIRELGRATQGVTLIALDAGEKLAGLEKVVESEEDVEEVGGAQGPESSELDESSSEPSEQDPAADPEQE

Features

Showing features for compositional bias.

TypeIDPosition(s)Description
Compositional bias863-880Acidic residues

Sequence databases

Nucleotide SequenceProtein SequenceMolecule TypeStatus
JEMX01000011
EMBL· GenBank· DDBJ
EXI82473.1
EMBL· GenBank· DDBJ
Genomic DNA

Genome annotation databases

Similar Proteins

Disclaimer

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