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・ Archaeopteryx (evolutionary tree visualization and analysis)
・ Archaeoraptor
・ Archaeorhizomyces finlayi
・ Archaeorhizomycetes
・ Archaeorhynchus
・ Archaeornithes
・ Archaeornithipus
・ Archaeornithoides
・ Archaeornithomimus
・ Archaeornithura
・ Archaeoses
・ Archaeoses magicosema
・ Archaeoses pentasema
・ Archaeoses polygrapha
・ Archaeosine synthase
Archaeosortase
・ Archaeospheniscus
・ Archaeospheniscus lopdelli
・ Archaeospheniscus lowei
・ Archaeospheniscus wimani
・ Archaeosporales
・ Archaeosuchus
・ Archaeosyodon
・ Archaeotherium
・ Archaeothyris
・ Archaeotriton
・ Archaeotrogonidae
・ Archaeovenator
・ Archaeozeus
・ Archaephippus


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Archaeosortase : ウィキペディア英語版
Archaeosortase
An archaeosortase is a protein that occurs in the cell membranes of some archaea. Archaeosortases recognize and remove carboxyl-terminal protein sorting signals about 25 amino acids long from secreted proteins. A genome that encodes one archaeosortase may encode over fifty target proteins. The best characterized archaeosortase target is the Haloferax volcanii S-layer glycoprotein, an extensively modified protein with O-linked glycosylations, N-linked glycosylations, and a large prenyl-derived lipid modification toward the C-terminus. It remains unclear if archaeosortase is a protease that simply removes the C-terminal segment , or a transpeptidase that attaches a lipid moiety in its place.
Archaeosortases are related to exosortases, their counterparts in Gram-negative bacteria. The names of both families of proteins reflect roles analogous to sortases in Gram-positive bacteria, with which they share no sequence homology. The sequences of archaeosortases and exosortases consists mostly of hydrophobic transmembrane helices, which sortases lack. Archaeosortases fall into a number of distinct subtypes, each responsible for recognizing sorting signals with a different signature motif. Archaeosortase A (ArtA) recognizes the PGF-CTERM signal, ArtB recognizes VPXXXP-CTERM, AtrC recognizes PEF-CTERM, and so on; one archaeal genome may encode two different archaeosortase systems.
==References==


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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