The name of this superfamily has been modified since the most recent official CATH+ release (v4_3_0). At the point of the last release, this superfamily was named:

"
5' to 3' exonuclease, C-terminal subdomain
".

Functional Families

Overview of the Structural Clusters (SC) and Functional Families within this CATH Superfamily. Clusters with a representative structure are represented by a filled circle.
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FunFam 3: DNA polymerase I

Please note: GO annotations are assigned to the full protein sequence rather than individual protein domains. Since a given protein can contain multiple domains, it is possible that some of the annotations below come from additional domains that occur in the same protein, but have been classified elsewhere in CATH.

There are 14 GO terms relating to "molecular function"

The search results have been sorted with the annotations that are found most frequently at the top of the list. The results can be filtered by typing text into the search box at the top of the table.
GO Term Annotations Evidence
DNA binding GO:0003677
Any molecular function by which a gene product interacts selectively and non-covalently with DNA (deoxyribonucleic acid).
128 P00582 (/IDA) P00582 (/IDA) P00582 (/IDA) P00582 (/IDA) P00582 (/IDA) P00582 (/IDA) P00582 (/IDA) P00582 (/IDA) P00582 (/IDA) P00582 (/IDA)
(118 more)
Magnesium ion binding GO:0000287
Interacting selectively and non-covalently with magnesium (Mg) ions.
69 P38506 (/IDA) P38506 (/IDA) P38506 (/IDA) P38506 (/IDA) P38506 (/IDA) P38506 (/IDA) P38506 (/IDA) P38506 (/IDA) P38506 (/IDA) P38506 (/IDA)
(59 more)
Protein binding GO:0005515
Interacting selectively and non-covalently with any protein or protein complex (a complex of two or more proteins that may include other nonprotein molecules).
69 P38506 (/IPI) P38506 (/IPI) P38506 (/IPI) P38506 (/IPI) P38506 (/IPI) P38506 (/IPI) P38506 (/IPI) P38506 (/IPI) P38506 (/IPI) P38506 (/IPI)
(59 more)
5'-flap endonuclease activity GO:0017108
Catalysis of the cleavage of a 5' flap structure in DNA, but not other DNA structures; processes the 5' ends of Okazaki fragments in lagging strand DNA synthesis.
69 P38506 (/IDA) P38506 (/IDA) P38506 (/IDA) P38506 (/IDA) P38506 (/IDA) P38506 (/IDA) P38506 (/IDA) P38506 (/IDA) P38506 (/IDA) P38506 (/IDA)
(59 more)
Potassium ion binding GO:0030955
Interacting selectively and non-covalently with potassium (K+) ions.
69 P38506 (/IDA) P38506 (/IDA) P38506 (/IDA) P38506 (/IDA) P38506 (/IDA) P38506 (/IDA) P38506 (/IDA) P38506 (/IDA) P38506 (/IDA) P38506 (/IDA)
(59 more)
DNA-directed DNA polymerase activity GO:0003887
Catalysis of the reaction: deoxynucleoside triphosphate + DNA(n) = diphosphate + DNA(n+1); the synthesis of DNA from deoxyribonucleotide triphosphates in the presence of a DNA template and a 3'hydroxyl group.
59 P00582 (/IDA) P00582 (/IDA) P00582 (/IDA) P00582 (/IDA) P00582 (/IDA) P00582 (/IDA) P00582 (/IDA) P00582 (/IDA) P00582 (/IDA) P00582 (/IDA)
(49 more)
3'-5' exonuclease activity GO:0008408
Catalysis of the hydrolysis of ester linkages within nucleic acids by removing nucleotide residues from the 3' end.
59 P00582 (/IDA) P00582 (/IDA) P00582 (/IDA) P00582 (/IDA) P00582 (/IDA) P00582 (/IDA) P00582 (/IDA) P00582 (/IDA) P00582 (/IDA) P00582 (/IDA)
(49 more)
5'-3' exonuclease activity GO:0008409
Catalysis of the hydrolysis of ester linkages within nucleic acids by removing nucleotide residues from the 5' end.
59 P00582 (/IDA) P00582 (/IDA) P00582 (/IDA) P00582 (/IDA) P00582 (/IDA) P00582 (/IDA) P00582 (/IDA) P00582 (/IDA) P00582 (/IDA) P00582 (/IDA)
(49 more)
DNA-directed DNA polymerase activity GO:0003887
Catalysis of the reaction: deoxynucleoside triphosphate + DNA(n) = diphosphate + DNA(n+1); the synthesis of DNA from deoxyribonucleotide triphosphates in the presence of a DNA template and a 3'hydroxyl group.
12 Q5LLS7 (/ISS) Q81L03 (/ISS) Q81L03 (/ISS) Q81L03 (/ISS) Q81L03 (/ISS) Q83AT5 (/ISS) Q88AP3 (/ISS) Q88AP3 (/ISS) Q9KVN3 (/ISS) Q9KVN3 (/ISS)
(2 more)
5'-3' exonuclease activity GO:0008409
Catalysis of the hydrolysis of ester linkages within nucleic acids by removing nucleotide residues from the 5' end.
4 Q38CK4 (/ISM) Q38CK4 (/ISM) Q38CK4 (/ISM) Q38CK4 (/ISM)
DNA binding GO:0003677
Any molecular function by which a gene product interacts selectively and non-covalently with DNA (deoxyribonucleic acid).
3 Q9HT80 (/ISS) Q9HT80 (/ISS) Q9HT80 (/ISS)
5'-3' exonuclease activity GO:0008409
Catalysis of the hydrolysis of ester linkages within nucleic acids by removing nucleotide residues from the 5' end.
3 Q83AT5 (/ISS) Q88AP3 (/ISS) Q88AP3 (/ISS)
Exonuclease activity GO:0004527
Catalysis of the hydrolysis of ester linkages within nucleic acids by removing nucleotide residues from the 3' or 5' end.
2 Q9KTK4 (/ISS) Q9KTK4 (/ISS)
3'-5' exonuclease activity GO:0008408
Catalysis of the hydrolysis of ester linkages within nucleic acids by removing nucleotide residues from the 3' end.
2 Q88AP3 (/ISS) Q88AP3 (/ISS)

There are 9 GO terms relating to "biological process"

The search results have been sorted with the annotations that are found most frequently at the top of the list. The results can be filtered by typing text into the search box at the top of the table.
GO Term Annotations Evidence
DNA replication, Okazaki fragment processing GO:0033567
The DNA metabolic process, occurring during lagging strand synthesis, by which RNA primers are removed from Okazaki fragments, the resulting gaps filled by DNA polymerization, and the ends ligated to form a continuous strand.
69 P38506 (/IDA) P38506 (/IDA) P38506 (/IDA) P38506 (/IDA) P38506 (/IDA) P38506 (/IDA) P38506 (/IDA) P38506 (/IDA) P38506 (/IDA) P38506 (/IDA)
(59 more)
DNA replication GO:0006260
The cellular metabolic process in which a cell duplicates one or more molecules of DNA. DNA replication begins when specific sequences, known as origins of replication, are recognized and bound by initiation proteins, and ends when the original DNA molecule has been completely duplicated and the copies topologically separated. The unit of replication usually corresponds to the genome of the cell, an organelle, or a virus. The template for replication can either be an existing DNA molecule or RNA.
59 P00582 (/IDA) P00582 (/IDA) P00582 (/IDA) P00582 (/IDA) P00582 (/IDA) P00582 (/IDA) P00582 (/IDA) P00582 (/IDA) P00582 (/IDA) P00582 (/IDA)
(49 more)
DNA-dependent DNA replication GO:0006261
A DNA replication process that uses parental DNA as a template for the DNA-dependent DNA polymerases that synthesize the new strands.
59 P00582 (/IDA) P00582 (/IDA) P00582 (/IDA) P00582 (/IDA) P00582 (/IDA) P00582 (/IDA) P00582 (/IDA) P00582 (/IDA) P00582 (/IDA) P00582 (/IDA)
(49 more)
DNA repair GO:0006281
The process of restoring DNA after damage. Genomes are subject to damage by chemical and physical agents in the environment (e.g. UV and ionizing radiations, chemical mutagens, fungal and bacterial toxins, etc.) and by free radicals or alkylating agents endogenously generated in metabolism. DNA is also damaged because of errors during its replication. A variety of different DNA repair pathways have been reported that include direct reversal, base excision repair, nucleotide excision repair, photoreactivation, bypass, double-strand break repair pathway, and mismatch repair pathway.
59 P00582 (/IMP) P00582 (/IMP) P00582 (/IMP) P00582 (/IMP) P00582 (/IMP) P00582 (/IMP) P00582 (/IMP) P00582 (/IMP) P00582 (/IMP) P00582 (/IMP)
(49 more)
Base-excision repair GO:0006284
In base excision repair, an altered base is removed by a DNA glycosylase enzyme, followed by excision of the resulting sugar phosphate. The small gap left in the DNA helix is filled in by the sequential action of DNA polymerase and DNA ligase.
59 P00582 (/IDA) P00582 (/IDA) P00582 (/IDA) P00582 (/IDA) P00582 (/IDA) P00582 (/IDA) P00582 (/IDA) P00582 (/IDA) P00582 (/IDA) P00582 (/IDA)
(49 more)
DNA replication GO:0006260
The cellular metabolic process in which a cell duplicates one or more molecules of DNA. DNA replication begins when specific sequences, known as origins of replication, are recognized and bound by initiation proteins, and ends when the original DNA molecule has been completely duplicated and the copies topologically separated. The unit of replication usually corresponds to the genome of the cell, an organelle, or a virus. The template for replication can either be an existing DNA molecule or RNA.
12 Q5LLS7 (/ISS) Q81L03 (/ISS) Q81L03 (/ISS) Q81L03 (/ISS) Q81L03 (/ISS) Q83AT5 (/ISS) Q88AP3 (/ISS) Q88AP3 (/ISS) Q9KVN3 (/ISS) Q9KVN3 (/ISS)
(2 more)
DNA catabolic process GO:0006308
The cellular DNA metabolic process resulting in the breakdown of DNA, deoxyribonucleic acid, one of the two main types of nucleic acid, consisting of a long unbranched macromolecule formed from one or two strands of linked deoxyribonucleotides, the 3'-phosphate group of each constituent deoxyribonucleotide being joined in 3',5'-phosphodiester linkage to the 5'-hydroxyl group of the deoxyribose moiety of the next one.
4 Q38CK4 (/ISM) Q38CK4 (/ISM) Q38CK4 (/ISM) Q38CK4 (/ISM)
DNA repair GO:0006281
The process of restoring DNA after damage. Genomes are subject to damage by chemical and physical agents in the environment (e.g. UV and ionizing radiations, chemical mutagens, fungal and bacterial toxins, etc.) and by free radicals or alkylating agents endogenously generated in metabolism. DNA is also damaged because of errors during its replication. A variety of different DNA repair pathways have been reported that include direct reversal, base excision repair, nucleotide excision repair, photoreactivation, bypass, double-strand break repair pathway, and mismatch repair pathway.
2 Q9KTK4 (/ISS) Q9KTK4 (/ISS)
DNA catabolic process GO:0006308
The cellular DNA metabolic process resulting in the breakdown of DNA, deoxyribonucleic acid, one of the two main types of nucleic acid, consisting of a long unbranched macromolecule formed from one or two strands of linked deoxyribonucleotides, the 3'-phosphate group of each constituent deoxyribonucleotide being joined in 3',5'-phosphodiester linkage to the 5'-hydroxyl group of the deoxyribose moiety of the next one.
2 Q9KTK4 (/ISS) Q9KTK4 (/ISS)

There are 6 GO terms relating to "cellular component"

The search results have been sorted with the annotations that are found most frequently at the top of the list. The results can be filtered by typing text into the search box at the top of the table.
GO Term Annotations Evidence
Cytoplasm GO:0005737
All of the contents of a cell excluding the plasma membrane and nucleus, but including other subcellular structures.
63 P00582 (/IDA) P00582 (/IDA) P00582 (/IDA) P00582 (/IDA) P00582 (/IDA) P00582 (/IDA) P00582 (/IDA) P00582 (/IDA) P00582 (/IDA) P00582 (/IDA)
(53 more)
Cytosol GO:0005829
The part of the cytoplasm that does not contain organelles but which does contain other particulate matter, such as protein complexes.
59 P00582 (/IDA) P00582 (/IDA) P00582 (/IDA) P00582 (/IDA) P00582 (/IDA) P00582 (/IDA) P00582 (/IDA) P00582 (/IDA) P00582 (/IDA) P00582 (/IDA)
(49 more)
Cell wall GO:0005618
The rigid or semi-rigid envelope lying outside the cell membrane of plant, fungal, most prokaryotic cells and some protozoan parasites, maintaining their shape and protecting them from osmotic lysis. In plants it is made of cellulose and, often, lignin; in fungi it is composed largely of polysaccharides; in bacteria it is composed of peptidoglycan; in protozoan parasites such as Giardia species, it's made of carbohydrates and proteins.
7 P9WNU5 (/HDA) P9WNU5 (/HDA) P9WNU5 (/HDA) P9WNU5 (/HDA) P9WNU5 (/HDA) P9WNU5 (/HDA) P9WNU5 (/HDA)
Plasma membrane GO:0005886
The membrane surrounding a cell that separates the cell from its external environment. It consists of a phospholipid bilayer and associated proteins.
7 P9WNU5 (/HDA) P9WNU5 (/HDA) P9WNU5 (/HDA) P9WNU5 (/HDA) P9WNU5 (/HDA) P9WNU5 (/HDA) P9WNU5 (/HDA)
Mitochondrion GO:0005739
A semiautonomous, self replicating organelle that occurs in varying numbers, shapes, and sizes in the cytoplasm of virtually all eukaryotic cells. It is notably the site of tissue respiration.
4 Q38CK4 (/RCA) Q38CK4 (/RCA) Q38CK4 (/RCA) Q38CK4 (/RCA)
Cytoplasm GO:0005737
All of the contents of a cell excluding the plasma membrane and nucleus, but including other subcellular structures.
1 Q4QC18 (/ISO)