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RNA polymerase 1 (also known as Pol I) is, in higher eukaryotes, the polymerase that only transcribes ribosomal RNA (but not 5S rRNA, which is synthesized by RNA polymerase III), a type of RNA that accounts for over 50% of the total RNA synthesized in a cell.
The 2006 Nobel Prize in Chemistry was awarded to Roger D. Kornberg for creating detailed molecular images of RNA polymerase during various stages of the transcription process. [3] [4] In most prokaryotes, a single RNA polymerase species transcribes all types of RNA.
20019 Ensembl ENSG00000068654 ENSMUSG00000049553 UniProt O95602 O35134 RefSeq (mRNA) NM_015425 NM_009088 RefSeq (protein) NP_056240 NP_033114 Location (UCSC) Chr 2: 86.02 – 86.11 Mb Chr 6: 71.89 – 71.96 Mb PubMed search Wikidata View/Edit Human View/Edit Mouse DNA-directed RNA polymerase I subunit RPA1 is an enzyme that in humans is encoded by the POLR1A gene. References ^ a b c GRCh38 ...
Transcription preinitiation complex, represented by the central cluster of proteins, causes RNA polymerase to bind to target DNA site. The PIC is able to bind both the promoter sequence near the gene to be transcribed and an enhancer sequence in a different part of the genome, allowing enhancer sequences to regulate a gene distant from it.
Unlike prokaryotic RNA polymerase that initiates the transcription of all different types of RNA, RNA polymerase in eukaryotes (including humans) comes in three variations, each translating a different type of gene. A eukaryotic cell has a nucleus that separates the processes of transcription and translation.
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