RPSBLAST alignment for GI: 254780661 and conserved domain: cd06138

>gnl|CDD|99841 cd06138, ExoI_N, N-terminal DEDDh 3'-5' exonuclease domain of Escherichia coli exonuclease I and similar proteins. This subfamily is composed of the N-terminal domain of Escherichia coli exonuclease I (ExoI) and similar proteins. ExoI is a monomeric enzyme that hydrolyzes single stranded DNA in the 3' to 5' direction. It plays a role in DNA recombination and repair. It primarily functions in repairing frameshift mutations. The N-terminal domain of ExoI is a DEDDh-type DnaQ-like 3'-5 exonuclease containing 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. The ExoI structure is unique among DnaQ family enzymes in that there is a large distance between the two metal ions required for catalysis and the catalytic histidine is oriented away from the active site. Length = 183
 Score =  293 bits (752), Expect = 7e-80
 Identities = 108/182 (59%), Positives = 131/182 (71%), Gaps = 1/182 (0%)

Query: 6   VIYDYETFGRDVALDRPAQFAGVRVDRQWEKIESTEVFFCKPADDYLPDPEAVFITGITP 65
           + YDYETFG + + D+  QFA +R D  + +IE     FC+   D LP PEA+ +TGITP
Sbjct: 1   LFYDYETFGLNPSFDQILQFAAIRTDENFNEIE-PFNIFCRLPPDVLPSPEALIVTGITP 59

Query: 66  QKALRDGVVEAEFSRRIHQFFSVPNTCIIGYNNIRFDDYYSRNIFYRNFYDSYRWSWDNG 125
           Q+ L++G+ E EF  +IH+ F+ P TCI+GYNNIRFDD + R  FYRN YD Y W W NG
Sbjct: 60  QQLLKEGLSEYEFIAKIHRLFNTPGTCIVGYNNIRFDDEFLRFAFYRNLYDPYTWEWKNG 119

Query: 126 NSRWDLLDVMRAIYAFSPDGIQWPSRDDGATSFKLQDLALANGIEHVNAHDAKADVYATL 185
           NSRWDLLDV+RA YA  PDGI WP  DDG  SFKL+DLA ANGIEH NAHDA +DV AT+
Sbjct: 120 NSRWDLLDVVRAYYALRPDGIVWPKNDDGKPSFKLEDLAQANGIEHSNAHDALSDVEATI 179

Query: 186 AL 187
           AL
Sbjct: 180 AL 181