>cd06134 RNaseT RNase T is a DEDDh-type DnaQ-like 3'-5' exoribonuclease E implicated in the 3' maturation of small stable RNAs and 23srRNA, and in the end turnover of tRNA. It contains three conserved sequence motifs termed ExoI, ExoII and ExoIII, with a specific Hx(4)D conserved pattern at ExoIII. These motifs are clustered around the active site and contain four conserved acidic residues that serve as ligands for the two metal ions required for catalysis. RNase T is related to the proofreading domain of DNA polymerase III. Despite its important role, RNase T is mainly found only in gammaproteobacteria. It is speculated that it might have originated from DNA polymerase III at the time the gamma division of proteobacteria diverged from other bacteria. RNase T is a homodimer with the catalytic residues of one monomer contacting a large basic patch on the other monomer to form a functional active site.

Probab=99.96 E-value=1.5e-27 Score=195.93 Aligned_cols=170 Identities=25% Similarity=0.204 Sum_probs=131.6 Q ss_pred CEEEEECCCCCCCCCCCEEEEEEEEEE--CCCCEE--CCEEEEEEECCCCCCCCCHHHHHHHCCCHHHHHHCCCCHHHHH Q ss_conf 379997527889877260489999998--389728--0400226621788877857898985799889960799979999 Q gi|254780661|r 4 HFVIYDYETFGRDVALDRPAQFAGVRV--DRQWEK--IESTEVFFCKPADDYLPDPEAVFITGITPQKALRDGVVEAEFS 79 (471) Q Consensus 4 ~~v~~D~ETtG~~~~~~~iiq~~~i~~--d~~~~~--~~~~~~~~~~~~~~~~p~p~a~~v~git~~~~~~~~~~~~e~~ 79 (471) T Consensus 6 ~~VV~D~ETTGL~p~~d~IIEIgav~v~~d~~g~i~~~~~~~-~~v~P~~~~~i~~~~~~itGIt~~~~~~~~~~~~~~~ 84 (189) T cd06134 6 LPVVVDVETGGFNPQTDALLEIAAVTLEMDEQGNLYPDETFH-FHILPFEGANLDPAALEFNGIDPFHPFRFAVDEKEAL 84 (189) T ss_pred CCEEEEEECCCCCCCCCEEEEEEEEEEEECCCCCCCCCCEEE-EEECCCCCCCCCHHHHHHCCCCCHHHHCCCCCHHHHH T ss_conf 507999528999988980799999999976878532451689-9778988998985566550777001100167577889 Q ss_pred HHHHHHHHCC-------CCEEEEEECHHHHHHHHHHHHHHHCCCCCCCCCCCCCCCCCHHHHHHHHHHHHHHHCCCCCCC Q ss_conf 9999995117-------965999505578999999999850785321325688710015888865556532100244444 Q gi|254780661|r 80 RRIHQFFSVP-------NTCIIGYNNIRFDDYYSRNIFYRNFYDSYRWSWDNGNSRWDLLDVMRAIYAFSPDGIQWPSRD 152 (471) Q Consensus 80 ~~i~~~~~~~-------~~~~ig~N~~~FD~~~lr~~~~r~~~~~y~~~~~~~~~~~D~l~~~~~~~~~~p~~~~~~~~~ 152 (471) T Consensus 85 ~~~~~~i~~~~~~~~~~~avlVaHN-a~FD~~FL~~~~~r~g~~~~p---~~~~~~~DTl~La~~~---~~--------- 148 (189) T cd06134 85 KEIFKPIRKALKAQGCTRAILVGHN-AHFDLGFLNAAVARCKIKRNP---FHPFSTFDTATLAGLA---YG--------- 148 (189) T ss_pred HHHHHHHHHHHHHCCCCCCEEEEEC-HHHHHHHHHHHHHHCCCCCCC---CCCCCEEEHHHHHHHH---HC--------- T ss_conf 9999999999875167555687517-777299999999984998888---8777656699998677---38--------- Q ss_pred CCCCCCCHHHHHHHHCCCCC--CCCHHHHHHHHHHHHHHHHHHH Q ss_conf 54433108989987188764--3101333189999999999864 Q gi|254780661|r 153 DGATSFKLQDLALANGIEHV--NAHDAKADVYATLALVWLIREK 194 (471) Q Consensus 153 ~~~~~~kL~~la~~n~i~~~--~aH~A~~D~~~t~~l~k~i~~~ 194 (471) T Consensus 149 ----~~~L~~l~~~~gi~~~~~~~HrAl~DA~~ta~lf~~l~~k 188 (189) T cd06134 149 ----QTVLAKACQAAGIEFDNKEAHSALYDTQKTAELFCKIVNR 188 (189) T ss_pred ----CCCHHHHHHHCCCCCCCCCCCCCHHHHHHHHHHHHHHHHH T ss_conf ----0019999998799999987887299999999999999964

HHsearch alignment for GI: 254780661 and conserved domain: cd06134