>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=96.66  E-value=0.003  Score=42.31  Aligned_cols=26  Identities=15%  Similarity=0.128  Sum_probs=21.0

Q ss_pred             CCCCCCCCCCCCCCCCCCCEEECCCC
Q ss_conf             32332224331100124420102577
Q gi|254780277|r  391 SFKIITDTMDAFHSKPIAIAISTLDQ  416 (976)
Q Consensus       391 a~DtETt~ld~~~~~ivGisls~~~~  416 (976)
T Consensus         3 WiDlEmTGLd~~~d~IiEIA~ivTD~   28 (173)
T cd06135           3 WIDLEMTGLDPEKDRILEIACIITDG   28 (173)
T ss_pred             EEECCCCCCCCCCCEEEEEEEEEECC
T ss_conf             99330368888886489999999889