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 ...
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 [4,5]. 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 [3]. 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.
The HRDC (Helicase and RNase D C-terminal) domain has a putative role in nucleic acid binding. Mutations in the HRDC domain cause human disease. It is interesting to note that the RecQ helicase in Deinococcus radiodurans has three tandem HRDC domains ...
The HRDC (Helicase and RNase D C-terminal) domain has a putative role in nucleic acid binding. Mutations in the HRDC domain cause human disease. It is interesting to note that the RecQ helicase in Deinococcus radiodurans has three tandem HRDC domains [4].
Ribonuclease D is a bacterial 3'-5' exonuclease that acts on tRNA. It contributes to the 3' maturation of several stable RNAs [1]. It consists of a catalytic domain (Pfam:PF01612) and two alpha- helical domains at the C-terminal that closely resemble ...
Ribonuclease D is a bacterial 3'-5' exonuclease that acts on tRNA. It contributes to the 3' maturation of several stable RNAs [1]. It consists of a catalytic domain (Pfam:PF01612) and two alpha- helical domains at the C-terminal that closely resemble the HRDC domain seen in RecQ-family helicases. This is the second HRDC domain from RNAse D. The first one is included in Pfam:PF00570.
Ribonuclease D is a divalent metal cation dependent exonuclease that acts on tRNA and is involved in the 3' processing of various precursor tRNAs. Initiates hydrolysis at the 3'-terminus of an RNA molecule and releases 5'-mononucleotides.
Defined by 5 residues: ASP:A-28GLU:A-30ASP:A-85TYR:A-151ASP:A-155
