>cd03134 GATase1_PfpI_like A type 1 glutamine amidotransferase (GATase1)-like domain found in PfpI from Pyrococcus furiosus. A type 1 glutamine amidotransferase (GATase1)-like domain found in PfpI from Pyrococcus furiosus. This group includes proteins similar to PfpI from P. furiosus. and PH1704 from Pyrococcus horikoshii. These enzymes are ATP-independent intracellular proteases and may hydrolyze small peptides to provide a nutritional source. Only Cys of the catalytic triad typical of GATase1 domains is conserved in this group. This Cys residue is found in the sharp turn between a beta strand and an alpha helix termed the nucleophile elbow. For PH1704, it is believed that this Cys together with a different His in one monomer and Glu (from an adjacent monomer) forms a different catalytic triad from the typical GATase1domain. PfpI is homooligomeric. Protease activity is only found for oligomeric forms of PH1704.

Probab=94.33  E-value=0.044  Score=35.34  Aligned_cols=60  Identities=20%  Similarity=0.346  Sum_probs=45.5

Q ss_pred             EECCCCHHHHHHCCCCEEEECCCCCCCCCC--CCCCHHHHHHHCCCCCCEEEEECHHHHHHHH
Q ss_conf             304657446441357889985888884101--1211012221025786347861005887875
Q gi|254780420|r  233 VGAETSYKDIMSLQPDGVLLSNGPGDPAVT--SVYSSPIICKLVDSGMPMFGICLGHQLLGLA  293 (396)
Q Consensus       233 vp~~~~~~~i~~~~pdgi~lSnGPGdP~~~--~~~~~~~~~~~~~~~iPilGIClGhQ~l~~a  293 (396)
T Consensus        49 v~~d~~l~~~~~~~yD~ivlPGG~g-~~~l~~~~~~~~~i~~~~~~~k~iaaIC~gp~~L~~~  110 (165)
T cd03134          49 VTVDLTIADVDADDYDALVIPGGTN-PDKLRRDPDAVAFVRAFAEAGKPVAAICHGPWVLISA  110 (165)
T ss_pred             EECCCCHHHCCHHHCCEEEECCCCC-HHHHHHCHHHHHHHHHHHHHCCCEEEECCHHHHHHHC
T ss_conf             8678657998962288899789858-8888529899999999997199299998757877457