smooth muscle contraction [GO_0006939]

A process in which force is generated within smooth muscle tissue, resulting in a change in muscle geometry. Force generation involves a chemo-mechanical energy conversion step that is carried out by the actin/myosin complex activity, which generates force through ATP hydrolysis. Smooth muscle differs from striated muscle in the much higher actin/myosin ratio, the absence of conspicuous sarcomeres and the ability to contract to a much smaller fraction of its resting length.
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Open smooth muscle contraction in VFB

VFB Term Json

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            "iri": "http://purl.obolibrary.org/obo/GO_0006939",
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            "short_form": "GO_0006939",
            "label": "smooth muscle contraction"
        },
        "description": [
            "A process in which force is generated within smooth muscle tissue, resulting in a change in muscle geometry. Force generation involves a chemo-mechanical energy conversion step that is carried out by the actin/myosin complex activity, which generates force through ATP hydrolysis. Smooth muscle differs from striated muscle in the much higher actin/myosin ratio, the absence of conspicuous sarcomeres and the ability to contract to a much smaller fraction of its resting length."
        ],
        "comment": []
    },
    "query": "Get JSON for Class",
    "version": "44725ae",
    "parents": [
        {
            "symbol": "",
            "iri": "http://purl.obolibrary.org/obo/GO_0006936",
            "types": [
                "Entity",
                "Class"
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            "short_form": "GO_0006936",
            "label": "muscle contraction"
        }
    ],
    "relationships": [
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            "relation": {
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                "label": "occurs in",
                "type": "occurs_in"
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                "short_form": "UBERON_0001135",
                "label": "smooth muscle tissue"
            }
        }
    ],
    "xrefs": [],
    "anatomy_channel_image": [],
    "pub_syn": [
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            "synonym": {
                "scope": "has_exact_synonym",
                "label": "visceral muscle contraction",
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