「セプチン」の版間の差分
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英語名:Septin 英語略名:SEPT | 英語名:Septin 英語略名:SEPT | ||
セプチンは[[真核生物]]に保存された重合性[[グアノシン三リン酸]](GTP)結合蛋白質ファミリーの総称である。セプチン重合体は多様な分子の足場ないし拡散障壁となり、[[樹状突起]]・軸索・[[繊毛]]・[[鞭毛]]の形成、[[微小管]]系やアクトミオシン系の制御、[[細胞分裂]]、分泌小胞の [[エキソサイトーシス]]など多彩な生命現象に関与する<ref><pubmed>18478031</pubmed></ref>。ヒトでは優性変異型SEPT9が家族性神経痛性筋萎縮症の原因となるほか<ref><pubmed>18478031<ref></pubmed></ref>、[[パーキンソン病]]や[[統合失調症]]では複数のセプチンの量的・質的異常が随伴する。 | |||
==歴史== | |||
細胞質分裂[[wikipedia:jp:細胞質分裂|細胞質分裂]](septation)と形態形成の異常を呈する出芽酵母[[wikipedia:jp:出芽酵母|出芽酵母]]Saccharomyces cerevisiaeの変異体Cdc3、Cdc10、Cdc11、Cdc12の原因遺伝子産物が出芽[[wikipedia:jp:出芽|出芽]]部位の細胞膜[[wikipedia:jp:細胞膜|細胞膜]]を環状に裏打ちするフィラメントの構成成分であることと、これらのホモログが多様な生物種に存在することが90年代半ばまでに判明し、セプチン(septin)と命名された<ref><pubmed>8791410<ref><pubmed>。 | |||
ファミリー | |||
セプチンファミリーに属する遺伝子は植物[[wikipedia:jp:植物|植物]]を除く真核生物のゲノム[[wikipedia:jp:ゲノム|ゲノム]]に2-14種類存在し、1次構造[[wikipedia:jp:一次構造|一次構造]]によって種ごとに2-4グループに分類できる(図1)。菌類[[wikipedia:jp:菌類|菌類]]と後生動物[[wikipedia:jp:後生動物|後生動物]]の間ではグループ間の対応関係の推定が困難であることから、多細胞化の過程で生化学[[wikipedia:jp:生化学|生化学]]的特性(後述)を保存しつつ共進化[[wikipedia:jp:共進化|共進化]]したものと推測される。 | |||
</ref> | |||
(執筆者:上田(石原)奈津実、木下専、担当編集委員:林康紀) | |||
2012年1月18日 (水) 14:35時点における版
英語名:Septin 英語略名:SEPT
セプチンは真核生物に保存された重合性グアノシン三リン酸(GTP)結合蛋白質ファミリーの総称である。セプチン重合体は多様な分子の足場ないし拡散障壁となり、樹状突起・軸索・繊毛・鞭毛の形成、微小管系やアクトミオシン系の制御、細胞分裂、分泌小胞の エキソサイトーシスなど多彩な生命現象に関与する[1]。ヒトでは優性変異型SEPT9が家族性神経痛性筋萎縮症の原因となるほか[2]、パーキンソン病や統合失調症では複数のセプチンの量的・質的異常が随伴する。
歴史
細胞質分裂細胞質分裂(septation)と形態形成の異常を呈する出芽酵母出芽酵母Saccharomyces cerevisiaeの変異体Cdc3、Cdc10、Cdc11、Cdc12の原因遺伝子産物が出芽出芽部位の細胞膜細胞膜を環状に裏打ちするフィラメントの構成成分であることと、これらのホモログが多様な生物種に存在することが90年代半ばまでに判明し、セプチン(septin)と命名された引用エラー: <ref>
タグに対応する </ref>
タグが不足しています
(執筆者:上田(石原)奈津実、木下専、担当編集委員:林康紀)
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