>cd06143 PAN2_exo PAN2 is the catalytic subunit of poly(A) nuclease (PAN), a Pab1p-dependent 3'-5' exoribonuclease which plays an important role in the posttranscriptional maturation of pre-mRNAs. PAN catalyzes the deadenylation of poly(A) tails, which are initially synthesized to default lengths of 70 to 90, to mRNA-specific lengths of 55 to 71. Pab1p and PAN also play a role in the export and decay of mRNA. PAN2 contains a DEDDh-type DnaQ-like 3'-5' exonuclease domain with 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.

Probab=99.29 E-value=9.8e-12 Score=93.29 Aligned_cols=150 Identities=16% Similarity=0.240 Sum_probs=108.6 Q ss_pred EEEECCCCCCCCCCC-------EE------EEEEEEEEECC--EECCC-EEEEEECCCCCCCCHHHEEECCCCCCCCCCC Q ss_conf 999846788888888-------89------99999999999--88031-3798985888228865724202101232248 Q gi|254780818|r 10 IVFDIETTGLDSKND-------RI------IEIGAVELLDY--SKTNR-TFQVFLCPNGRKNSPEALKLHGITDEFLKDK 73 (245) Q Consensus 10 iv~D~ETTGl~~~~d-------~I------ieigav~i~~~--~~~~~-~f~~~i~P~~~~i~~~~~~ihGIt~~~l~~~ 73 (245) T Consensus 1 valDcE~Vg~g~~~~~~~~~g~~~~~~~~~~aLARvSiV~~~g~~~G~vl~D~yVkP~-~~VtDYrT~~SGIt~~~L~~~ 79 (174) T cd06143 1 VAIDAEFVKLKPEETEIRSDGTKSTIRPSQMSLARVSVVRGEGELEGVPFIDDYISTT-EPVVDYLTRFSGIKPGDLDPK 79 (174) T ss_pred CCCCCEEEEECCCCCCCCCCCCEEECCCCCCCCEEEEEECCCCCCCCCEEEEEEECCC-CCCCCCCCCCCCCCHHHCCCC T ss_conf 9152214664464120257884411035676430278984458716888855517899-974625871635688895855 Q ss_pred C------CCCHHHHHHHHHHHCCCCEEEEECCCCCCCEEEECHHCCCCCCCCCCHHCCCHHCCCCCCCCC-CCCHHHHHH Q ss_conf 5------210023447775300232023102322431121000001122221000011000000017764-222378999 Q gi|254780818|r 74 P------SFSSIFSEFWDFFNEQNAEWIAHNAKFDVGFINAELQRINKDPLDPSRIIDTLSIARRKHPSS-RNDLNSLCK 146 (245) Q Consensus 74 p------~f~ev~~~f~~fi~~~~~~lVaHNa~FD~~fL~~el~r~~~~~~~~~~~iDTl~lar~~~p~~-~~~L~~l~~ 146 (245) T Consensus 80 ~s~~~~~~~~~~~~~l~~li~-~~~ILVGHsL~nDL~aL~-------l~h-P~~~i~DTs~l~~--~~~~r~~sLk~La~ 148 (174) T cd06143 80 TSSKNLTTLKSAYLKLRLLVD-LGCIFVGHGLAKDFRVIN-------IQV-PKEQVIDTVELFH--LPGQRKLSLRFLAW 148 (174) T ss_pred CCCCCCCCHHHHHHHHHHHCC-CCCEEECCCCHHHHHHHC-------CCC-CCCCEEECHHHCC--CCCCCCCCHHHHHH T ss_conf 564443409999999998547-996897896366798850-------669-9866577788526--89988708999999 Q ss_pred HH-CCCCCCCCCCCCHHHHHHHHHHHH Q ss_conf 71-875455566640269999999999 Q gi|254780818|r 147 RY-GITISHRSKHGALLDSHLLSDVYI 172 (245) Q Consensus 147 ~~-~i~~~~r~~H~Al~Da~~~a~v~~ 172 (245) T Consensus 149 ~~Lg~~IQ~-g~HdSvEDArAam~LYr 174 (174) T cd06143 149 YLLGEKIQS-ETHDSIEDARTALKLYR 174 (174) T ss_pred HHCCCCCCC-CCCCCHHHHHHHHHHHC T ss_conf 980810469-89593999999999629

HHsearch alignment for GI: 254780818 and conserved domain: cd06143