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DnaB helicase is an enzyme in bacteria which opens the replication fork during DNA replication.Although the mechanism by which DnaB both couples ATP hydrolysis to translocation along DNA and denatures the duplex is unknown, a change in the quaternary structure of the protein involving dimerisation of the N-terminal domain has been observed and may occur during the enzymatic cycle. [1]
DNA helicases are frequently attracted to regions of DNA damage and are essential for cellular DNA replication, recombination, repair, and transcription. Chemical manipulation of their molecular processes can change the rate at which cancer cells divide, as well as, the efficiency of transactions and cellular homeostasis.
The two base-pair complementary chains of the DNA molecule allow replication of the genetic instructions. The "specific pairing" is a key feature of the Watson and Crick model of DNA, the pairing of nucleotide subunits. [5] In DNA, the amount of guanine is equal to cytosine and the amount of adenine is equal to thymine. The A:T and C:G pairs ...
Before this loss, DNA methylation allows the adequate expansion of the genome. [30] In humans, the nuclear genome comprises approximately 3.1 billion nucleotides of DNA, divided into 24 linear molecules, the shortest 45 000 000 nucleotides in length and the longest 248 000 000 nucleotides, each contained in a different chromosome. [45]
A region of repetitive, non-coding genomic DNA in which certain DNA motifs (typically 10–60 bases in length) are tandemly repeated (typically 5–50 times). In the human genome, minisatellites occur at more than 1,000 loci, especially in centromeres and telomeres , and exhibit high mutation rates and high variability between individuals.
The polymerase chain reaction is the most widely used method for in vitro DNA amplification for purposes of molecular biology and biomedical research. [1] This process involves the separation of the double-stranded DNA in high heat into single strands (the denaturation step, typically achieved at 95–97 °C), annealing of the primers to the single stranded DNA (the annealing step) and copying ...
13211 Ensembl ENSG00000135829 ENSMUSG00000042699 UniProt Q08211 O70133 RefSeq (mRNA) NM_001357 NM_030588 NM_007842 RefSeq (protein) NP_001348 NP_031868 NP_001392438 Location (UCSC) Chr 1: 182.84 – 182.89 Mb Chr 1: 153.33 – 153.36 Mb PubMed search Wikidata View/Edit Human View/Edit Mouse ATP-dependent RNA helicase A (RHA ; also known as DHX9, LKP, and NDHI) is an enzyme that in humans is ...
Protein engineering is the process of developing useful or valuable proteins through the design and production of unnatural polypeptides, often by altering amino acid sequences found in nature. [1]