Tclin POLA1 DNA polymerase alpha catalytic subunit

Protein Summary

Description

Plays an essential role in the initiation of DNA replication. During the S phase of the cell cycle, the DNA polymerase alpha complex (composed of a catalytic subunit POLA1/p180, a regulatory subunit POLA2/p70 and two primase subunits PRIM1/p49 and PRIM2/p58) is recruited to DNA at the replicative forks via direct interactions with MCM10 and WDHD1. The primase subunit of the polymerase alpha complex initiates DNA synthesis by oligomerising short RNA primers on both leading and lagging strands. These primers are initially extended by the polymerase alpha catalytic subunit and subsequently transferred to polymerase delta and polymerase epsilon for processive synthesis on the lagging and leading strand, respectively. The reason this transfer occurs is because the polymerase alpha has limited processivity and lacks intrinsic 3' exonuclease activity for proofreading error, and therefore is not well suited for replicating long complexes. In the cytosol, responsible for a substantial proportion of the physiological concentration of cytosolic RNA:DNA hybrids, which are necessary to prevent spontaneous activation of type I interferon responses (PubMed:27019227). This gene encodes the catalytic subunit of DNA polymerase, which together with a regulatory and two primase subunits, forms the DNA polymerase alpha complex. The catalytic subunit plays an essential role in the initiation of DNA replication. [provided by RefSeq, Mar 2010]

Uniprot Accession IDs

• P09884
• Q86UQ7

Gene Name

• POLA1

Ensembl ID

• ENST00000379059
• ENSP00000368349
• ENSG00000101868

Symbol

• POLA
• NSX
• POLA
• p180

Knowledge Table

Most Knowledge About	Knowledge Value (0 to 1 scale)
protein domain	0.99
molecular function	0.96
virus	0.89
histone modification site profile	0.85
virus perturbation	0.85

Protein Classes

No PANTHER Classes or DTO Classes found

IDG Development Level Summary

Tdark

These are targets about which virtually nothing is known. They do not have known drug or small molecule activities
- AND - satisfy two or more of the following criteria:

Pubmed score: 272.99   (req: < 5)

Gene RIFs: 29   (req: <= 3)

Antibodies: 179   (req: <= 50)

Tbio

These targets do not have known drug or small molecule activities
- AND - satisfy two or more of the following criteria:

Pubmed score: 272.99   (req: >= 5)

Gene RIFs: 29   (req: > 3)

Antibodies: 179   (req: > 50)

- OR - satisfy the following criterion:

Gene Ontology Terms: 27

Tchem

Target has at least one ChEMBL compound with an activity cutoff of < 30 nM - AND - satisfies the preceding conditions

Active Ligands: 8

Tclin

Target has at least one approved drug - AND - satisfies the preceding conditions

Active Drugs: 4