>cd06135 Orn Oligoribonuclease (Orn) is a DEDDh-type DnaQ-like 3'-5' exoribonuclease that is responsible for degrading small oligoribonucleotides to mononucleotides. 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. Orn is essential for E.coli survival. The human homolog, also called Sfn (small fragment nuclease), is able to hydrolyze short single-stranded RNA and DNA oligomers. It plays a role in cellular nucleotide recycling.

Probab=99.70 E-value=1.3e-17 Score=130.11 Aligned_cols=147 Identities=20% Similarity=0.301 Sum_probs=104.2 Q ss_pred EEEECCCCCCCCCCCEEEEEEEEEEEC-CEECCCEEEEEECCCCC---CCCHHHEEEC---CCCCCCCCCCCCCCHHHHH Q ss_conf 999846788888888899999999999-98803137989858882---2886572420---2101232248521002344 Q gi|254780818|r 10 IVFDIETTGLDSKNDRIIEIGAVELLD-YSKTNRTFQVFLCPNGR---KNSPEALKLH---GITDEFLKDKPSFSSIFSE 82 (245) Q Consensus 10 iv~D~ETTGl~~~~d~Iieigav~i~~-~~~~~~~f~~~i~P~~~---~i~~~~~~ih---GIt~~~l~~~p~f~ev~~~ 82 (245) T Consensus 2 vWiDlEmTGLd~~~d~IiEIA~ivTD~~L~~~~eg~~~vI~~~~~~L~~M~~w~~~~H~~sGL~~~v~~s~~t~~~ae~~ 81 (173) T cd06135 2 VWIDLEMTGLDPEKDRILEIACIITDGDLNIIAEGPELVIHQPDEVLDGMDEWCTEMHTKSGLTERVRASTVTLAQAEAE 81 (173) T ss_pred EEEECCCCCCCCCCCEEEEEEEEEECCCCCEECCCCEEEEECCHHHHHHHHHHHHHHCCCCCHHHHHHHCCCCHHHHHHH T ss_conf 59933036888888648999999988998770356318882887998776568775033244167887369999999999 Q ss_pred HHHHHHC----CCCEEEEECCCCCCCEEEECHHCCCCCCCCCCHHCCCHHCCCCCCCCCCCCHHHHHHHHCCC-----CC Q ss_conf 7775300----23202310232243112100000112222100001100000001776422237899971875-----45 Q gi|254780818|r 83 FWDFFNE----QNAEWIAHNAKFDVGFINAELQRINKDPLDPSRIIDTLSIARRKHPSSRNDLNSLCKRYGIT-----IS 153 (245) Q Consensus 83 f~~fi~~----~~~~lVaHNa~FD~~fL~~el~r~~~~~~~~~~~iDTl~lar~~~p~~~~~L~~l~~~~~i~-----~~ 153 (245) T Consensus 82 ~l~Fi~~~~~~~~~pLaGNSV~~Dr~FL~k~mP~l~-~~l-hYR~iDVSs------------ikel~~rw~p~~~~~~~~ 147 (173) T cd06135 82 LLEFIKKYVPKGKSPLAGNSVHQDRRFLDKYMPELE-EYL-HYRILDVSS------------IKELARRWYPEIYRKAPK 147 (173) T ss_pred HHHHHHHHCCCCCCCCCCCCHHHHHHHHHHHCCHHH-HHC-CCEEEEHHH------------HHHHHHHHCCHHHHCCCC T ss_conf 999999976799853157648770999998580679-759-870466777------------999999869163400699 Q ss_pred CCCCCCCHHHHHHHHHH Q ss_conf 55666402699999999 Q gi|254780818|r 154 HRSKHGALLDSHLLSDV 170 (245) Q Consensus 154 ~r~~H~Al~Da~~~a~v 170 (245) T Consensus 148 K~~~HrAl~DI~eSI~E 164 (173) T cd06135 148 KKGTHRALDDIRESIAE 164 (173) T ss_pred CCCCCCHHHHHHHHHHH T ss_conf 87774349899999999

HHsearch alignment for GI: 254780818 and conserved domain: cd06135