>gnl|CDD|176475 cd08638, DNA_pol_A_theta, DNA polymerase theta is a low-fidelity family A enzyme implicated in translesion synthesis and in somatic hypermutation. DNA polymerase theta is a low-fidelity family A enzyme implicated in translesion synthesis (TLS) and in somatic hypermutation (SHM). DNA-dependent DNA polymerases can be classified in six main groups based upon phylogenetic relationships with E. coli polymerase I (classA), E. coli polymerase II (class B), E.coli polymerase III (class C), euryarchaaeota polymerase II (class D), human polymerase beta (class x), E. coli UmuC/DinB and eukaryotic RAP 30/Xeroderma pigmentosum variant (class Y). Family A polymerase functions primarily to fill DNA gaps that arise during DNA repair, recombination and replication. Pol theta is an exception among family A polymerases and generates processive single base substitutions. Family A polymerase are found primarily in organisms related to prokaryotes and include prokaryotic DNA polymerase I (pol I) ,mitochondrial polymerase delta, and several bacteriphage polymerases including those from odd-numbered phage (T3, T5, and T7). Prokaryotic Pol Is have two functional domains located on the same polypeptide; a 5'-3' polymerase and 5'-3' exonuclease. Pol I uses its 5' nuclease activity to remove the ribonucleotide portion of newly synthesized Okazaki fragments and DNA polymerase activity to fill in the resulting gap. Polymerase theta mostly has amino-terminal helicase domain, a carboxy-terminal polymerase domain and an intervening space region. Length = 373

 Score =  328 bits (842), Expect = 6e-90
 Identities = 136/346 (39%), Positives = 202/346 (58%), Gaps = 29/346 (8%)

Query: 651 KTTAQDLEQINCGDNPIIKNILEWRQLSKIKSTYADSLPNHI--NKRTQ--RVHTFYSLA 706
            T+ + LEQ+    +P+ K ILE+R+LSK+ +TY + L      +   Q  R+H  ++  
Sbjct: 30  STSKEVLEQLK-RLHPLPKLILEYRKLSKLLTTYVEPLLLLCKLSSSLQMYRIHPTWNQT 88

Query: 707 STMTGRLASLEPNLQNIP----IKTDLGQK-----------IRRAFISPPTKKLISADYS 751
            T TGRL+S EPNLQN+P    IK                 +R AFI PP + L+SADYS
Sbjct: 89  GTATGRLSSSEPNLQNVPKDFEIKDAPSPPAGSEGDIPTISLRHAFIPPPGRVLLSADYS 148

Query: 752 QIELRILAHIAKITPLYQVFENSLDIHRMVAAEIFGVNIEKVSPQMRRHAKTINFSIIYG 811
           Q+ELRILAH++    L ++  +  D+ +M+AA+  G  +E+V+ + R+ AK + + I+YG
Sbjct: 149 QLELRILAHLSGDPALIELLNSGGDVFKMIAAQWLGKPVEEVTDEERQQAKQLVYGILYG 208

Query: 812 ISPFRLATQLRIPRSEAADYIKRYFHRFPGIHEYIEKTKNFVRQNGYVETIFGRRIHYDE 871
           +    LA QL +   EA  +I+ + + +PG+  +I +T    R+NG+VET+ GRR +  E
Sbjct: 209 MGAKSLAEQLGVSEEEAKQFIESFKNAYPGVRRFIRETIERARRNGFVETLTGRRRYLPE 268

Query: 872 INSPKSSIRNINERAAINAPIQGSAADITRRAMISVHKSLEDHKLATK-----MLLQIHD 926
           INS  SS R   ER A+N  IQGSAADI + AMI++H+ L             ++LQIHD
Sbjct: 269 INSGNSSERAQAERQAVNTVIQGSAADIMKIAMINIHEKLHSLLPNLPAGRARLVLQIHD 328

Query: 927 ELVFEVPEEEITTASQIIVHSMEKACLPKINLRVPLKVNIKVSNNW 972
           EL+FEVPE ++   ++II  SME A      L VPL V + +  +W
Sbjct: 329 ELLFEVPESDVDEVARIIKRSMENAA----KLSVPLPVKVSIGKSW 370