Aliases for POLA1 Gene
External Ids for POLA1 Gene
Previous HGNC Symbols for POLA1 Gene
Previous GeneCards Identifiers for POLA1 Gene
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]
GeneCards Summary for POLA1 Gene
POLA1 (DNA Polymerase Alpha 1, Catalytic Subunit) is a Protein Coding gene. Diseases associated with POLA1 include Pigmentary Disorder, Reticulate, With Systemic Manifestations, X-Linked and N Syndrome. Among its related pathways are Mismatch repair and E2F transcription factor network. GO annotations related to this gene include nucleic acid binding and nucleotide binding.
UniProtKB/Swiss-Prot for POLA1 Gene
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).