RPSBLAST alignment for GI: 254780636 and conserved domain: pfam01612

>gnl|CDD|144991 pfam01612, 3_5_exonuc, 3'-5' exonuclease. This domain is responsible for the 3'-5' exonuclease proofreading activity of E. coli DNA polymerase I (polI) and other enzymes, it catalyses the hydrolysis of unpaired or mismatched nucleotides. This domain consists of the amino-terminal half of the Klenow fragment in E. coli polI it is also found in the Werner syndrome helicase (WRN), focus forming activity 1 protein (FFA-1) and ribonuclease D (RNase D). Werner syndrome is a human genetic disorder causing premature aging; the WRN protein has helicase activity in the 3'-5' direction. The FFA-1 protein is required for formation of a replication foci and also has helicase activity; it is a homologue of the WRN protein. RNase D is a 3'-5' exonuclease involved in tRNA processing. Also found in this family is the autoantigen PM/Scl thought to be involved in polymyositis-scleroderma overlap syndrome. Length = 172
 Score =  125 bits (315), Expect = 1e-29
 Identities = 53/155 (34%), Positives = 83/155 (53%), Gaps = 4/155 (2%)

Query: 20  VDAIAVDTET--LGLMPRRDRLCIVQLSPGDGTVDIIRIAAGQKNAPNLVGMLVDEKREK 77
              +AVDTET  L         C++Q+S G+G   II   A   +   L  +L D    K
Sbjct: 20  AKVVAVDTETTSLDTYSYTLVGCLIQISTGEGAY-IIDPLALGDDLEGLKRLLEDPNITK 78

Query: 78  IFHYGRFDIAVLFYTFGVRVRPVFCTKIASRLTRTYTNQHGLKDNLKELLGINISKAQQS 137
           + H  +FD+ VL   FG+++  +F T +A+ L   Y   H L D  ++ LG+ + K++Q 
Sbjct: 79  VGHNAKFDLEVLARDFGIKLENLFDTMLAAYL-LGYPRSHSLDDLAEKYLGVELDKSEQC 137

Query: 138 SDWSADDLSDEQLQYAASDVVHLHALRLQFTEKLQ 172
           +DW A  LS+EQL+YAA D  +L  L  +  ++L+
Sbjct: 138 ADWRARPLSEEQLRYAAEDADYLLRLYDKLRKELE 172