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・ Pseudagrion spernatum
・ Pseudagrion sublacteum
・ Pseudagrion sudanicum
・ Pseudagrion superbum
・ Pseudagrion torridum
・ Pseudagrion vumbaense
・ Pseudagrostistachys
・ Pseudagrostistachys africana
・ Pseudalastor
・ Pseudalbara
・ Pseudalbara fuscifascia
・ Pseudalbara parvula
・ Pseudalcathoe
・ Pseudalcis
・ PSEmu Pro
PSEN1
・ PSEN2
・ Psenes
・ Psenicubiceps
・ Psenocerus supernotatus
・ Psenopsis
・ Psephis
・ Psephis gomalis
・ Psephis ministralis
・ Psephis myrmidonalis
・ Psephite
・ Psephochelys
・ Psephoderma
・ Psepholograph
・ Psephology


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PSEN1 : ウィキペディア英語版
PSEN1

Presenilin-1 (PS-1) is a protein that in humans is encoded by the ''PSEN1'' gene. Presenilin 1 is one of the four core proteins in presenilin complex, which mediate the regulated proteolytic events of several proteins in the cell, including gamma secretase. Gamma-secretase is considered to play a very important role in generation of beta amyloid, accumulation of which is related to the onset of Alzheimer's Disease, from the beta-amyloid precursor protein.
== Structure ==

Presenilin possesses a 9 transmembrane topology, with an extracellular C-terminus and a cytosolic N-terminus. Presenilin is subject to undergo endo-proteolytic processing to produce ~27-28 kDa N-terminal and ~16-17 kDa C-terminal fragments in humans. Furthermore, presenilin exists in the cell mainly as a heterodimer of the C-terminal and N-terminus fragments.〔 When presenilin 1 is over expressed, the full length protein accumulates in an inactive form. Based on evidence that a gamma-secretase inhibitor binds to the fragments, the cleaved presenilin complex is considered to be the active form.

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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