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{
    "metadata": {
        "accession": "O27661",
        "id": "TOP1_METTH",
        "source_organism": {
            "taxId": "187420",
            "scientificName": "Methanothermobacter thermautotrophicus (strain ATCC 29096 / DSM 1053 / JCM 10044 / NBRC 100330 / Delta H)",
            "fullName": "Methanothermobacter thermautotrophicus (strain ATCC 29096 / DSM 1053 / JCM 10044 / NBRC 100330 / Delta H)"
        },
        "name": "DNA topoisomerase 1",
        "description": [
            "Releases the supercoiling and torsional tension of DNA, which is introduced during the DNA replication and transcription, by transiently cleaving and rejoining one strand of the DNA duplex. Introduces a single-strand break via transesterification at a target site in duplex DNA. The scissile phosphodiester is attacked by the catalytic tyrosine of the enzyme, resulting in the formation of a DNA-(5'-phosphotyrosyl)-enzyme intermediate and the expulsion of a 3'-OH DNA strand. The free DNA strand then undergoes passage around the unbroken strand, thus removing DNA supercoils. Finally, in the religation step, the DNA 3'-OH attacks the covalent intermediate to expel the active-site tyrosine and restore the DNA phosphodiester backbone"
        ],
        "length": 718,
        "sequence": "MRSLSGKMHEVIICEKPKSSEKIAGALFPDAMKKKHGKVSYWEHVEGDKRVTIVSAVGHLYSLRPRQSNEEHFFDLEWAPIHEIDKKKGYVKDYLNVIRKFAAGADRYIHACDYDIEGTLIGFNALKYGCGEEALRKTSRMKFSTLTREEIQRAYKNPIEVDYGQVDSGAARHILDFIFGVNISRSLMKSVKAATNRFIKLSAGRVQTPTLAILVEREKEIRDFKPVPYWIIRAELGEGIIAESKRGKIFKRELVDSILEKCQGSDAEVKDVRVRDTIRKPPVPFDLGTLQSEAYRVFGFSPKKTQTIAQNLYTEGYTSYPRTSSQKLPESIGYEKILKNLAKNPRFGVHIERLRGPLKPHEGKKEDDAHPAIHPTGLLPSELSKDEKKVYDLIVHRFISVFGEDAILQTMKVELEIGEEEFSFSRKRVSKAGWMESYPYTKMEDEEFPEISGGDSLAVRSVSADERETKPPARYNEASLIRELERRGLGTKSTRADIIAKLYDRKYIEGKKIRVSPLGENIIDTLTRYCEKIISEELTRQFERELEDIMRGKISKDRVIDEAITEVRSILSDIEENLRDIGKELYRAYQDSRVVGECPACGGKLVIKYSPRNRSTFVGCSSYPDCRTVYSLPRGASVLKSLCEKCGLPMISYGRPRQRACLDPKCGKKKSEVEEVVGKCPECGSDLIKRSGRYGEFVGCKGFPKCRFTCSVDEVPEG",
        "proteome": "UP000005223",
        "gene": "topA",
        "go_terms": [
            {
                "identifier": "GO:0003677",
                "name": "DNA binding",
                "category": {
                    "code": "F",
                    "name": "molecular_function"
                }
            },
            {
                "identifier": "GO:0003916",
                "name": "DNA topoisomerase activity",
                "category": {
                    "code": "F",
                    "name": "molecular_function"
                }
            },
            {
                "identifier": "GO:0006265",
                "name": "DNA topological change",
                "category": {
                    "code": "P",
                    "name": "biological_process"
                }
            },
            {
                "identifier": "GO:0005694",
                "name": "chromosome",
                "category": {
                    "code": "C",
                    "name": "cellular_component"
                }
            },
            {
                "identifier": "GO:0003917",
                "name": "DNA topoisomerase type I (single strand cut, ATP-independent) activity",
                "category": {
                    "code": "F",
                    "name": "molecular_function"
                }
            }
        ],
        "protein_evidence": 3,
        "source_database": "reviewed",
        "is_fragment": false,
        "in_alphafold": true,
        "in_bfvd": false,
        "ida_accession": "11c2314b289f96f2d423a6c34998a980f58fa56e",
        "counters": {
            "domain_architectures": 2266,
            "entries": 34,
            "isoforms": 0,
            "proteomes": 1,
            "sets": 3,
            "structures": 0,
            "taxa": 1,
            "dbEntries": {
                "smart": 3,
                "profile": 2,
                "cathgene3d": 5,
                "ssf": 2,
                "cdd": 1,
                "pfam": 3,
                "panther": 1,
                "hamap": 1,
                "ncbifam": 1,
                "prints": 1,
                "prosite": 1,
                "interpro": 13
            },
            "proteome": 1,
            "taxonomy": 1,
            "similar_proteins": 2266
        }
    }
}