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Destrin
Destrin or DSTN (also known as actin depolymerizing factor or ADF) is a protein which in humans is encoded by the ''DSTN'' gene.〔(【引用サイトリンク】 url =http://www.ncbi.nlm.nih.gov/sites/entrez?Db=gene&Cmd=ShowDetailView&TermToSearch=11034 )〕 Destrin is a component protein in microfilaments.
The product of this gene belongs to the actin-binding proteins ADF (Actin-Depolymerizing Factor)/cofilin family. This family of proteins is responsible for enhancing the turnover rate of actin in vivo. This gene encodes the actin depolymerizing protein that severs actin filaments (F-actin) and binds to actin monomers (G-actin). Two transcript variants encoding distinct isoforms have been identified for this gene.〔
==Structure==
The tertiary structure of destrin was determined by the use of triple-resonance multidimensional nuclear magnetic resonance, NMR.〔 The secondary and tertiary structures of destrin are similar to the gelsolin family which is another actin-regulating protein family.
There are three ordered layers to destrin which is a globular protein. There is a central β sheet that is composed of one parallel strand and three antiparallel strands. This β sheet is between a long α helix along with a shorter one and two shorter helices on the opposite side. The four helices are parallel to the β strands.〔
抄文引用元・出典: フリー百科事典『 ウィキペディア（Wikipedia）』
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