>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=92.27  E-value=0.088  Score=32.97  Aligned_cols=59  Identities=14%  Similarity=0.335  Sum_probs=40.3

Q ss_pred             ECCCCCHHHHHHCCCCEEEECCCCCCCCCCCCCC---CCHHHHHCCCCEEEECHHHHHHHHH
Q ss_conf             5289898899723997999985388999999975---3768980899889977899998997
Q gi|254780414|r   37 IAFKNALDYFKEQNPQAIILSGSPASSLDIDSPQ---IPKEILESNIPLLGICYGQQIMCQS   95 (520)
Q Consensus        37 ~P~~~~~e~i~~~~p~GIILSGGP~SV~d~~ap~---~~~~I~~~~iPILGICyG~QlLa~~   95 (520)
T Consensus        49 v~~d~~l~~~~~~~yD~ivlPGG~g~~~l~~~~~~~~~i~~~~~~~k~iaaIC~gp~~L~~~  110 (165)
T cd03134          49 VTVDLTIADVDADDYDALVIPGGTNPDKLRRDPDAVAFVRAFAEAGKPVAAICHGPWVLISA  110 (165)
T ss_pred             EECCCCHHHCCHHHCCEEEECCCCCHHHHHHCHHHHHHHHHHHHHCCCEEEECCHHHHHHHC
T ss_conf             86786579989622888997898588888529899999999997199299998757877457