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DNA Excision Repair Pathways - DNA Replication and Human
DNA Excision Repair Pathways - DNA Replication and Human

... Rad2, Rad4, RadlO, and Radl4. This supercomplex comprising at least these 11 proteins is referred to as the nucleotide excision repairosome (Svejstrup et al. 1995). There are indications of comparable protein complexes for transcription and NER in human cells (Roy et al. 1994). The observation that ...
Comparative Genomics of Hemiascomycete Yeasts: Genes Involved
Comparative Genomics of Hemiascomycete Yeasts: Genes Involved

... studied the conservation of 106 genes involved in replication, repair, and recombination in Candida glabrata, Kluyveromyces lactis, Debaryomyces hansenii, and Yarrowia lipolytica and compared them with their Saccharomyces cerevisiae orthologues. We found that proteins belonging to the replication fo ...
Decomposition of nucleic acids in soil
Decomposition of nucleic acids in soil

... time in an acidic (pH = 4.6) sandy silt loam soil, only 7% of nucleic acid-N was mineralized. The mineralization of nucleic acid-C occurred at a lower rate than N mineralization in all soils. At the end of the decomposition experiment, similar amounts of N were mineralized from DNA and RNA in sand s ...
Enzyme Mechanisms - Illinois Institute of Technology
Enzyme Mechanisms - Illinois Institute of Technology

... Cross-shaped structures arise from palindromic structures, including interrupted palindromes like this example These are less stable than regular duplexes but they are common, and they do create recognition sites for DNA-binding proteins, including restriction enzymes ...
Case 31 Hyperactive DNAse I Variants: A Treatment for Cystic
Case 31 Hyperactive DNAse I Variants: A Treatment for Cystic

... The plasmid is the most stable in the supercoiled form. If the phosphodiester backbone is nicked on one strand, the plasmid forms a relaxed circle, but if the backbone is cut on both strands, the circle linearizes, as shown in Figure 31.1. Supercoiled, relaxed circular and linear DNA can be detected ...
Dr. Mani Tagmount, as used
Dr. Mani Tagmount, as used

... To Save columns: If your plan is to pool your RNA samples. Pool first ...
Biology DNA: The Genetic Material
Biology DNA: The Genetic Material

... It occurs during the synthesis (S) phase of the cell cycle, before a cell divides. The process can be broken down into three steps. Step 1: Before replication can begin, the double helix must unwind. This is accomplished by enzymes called DNA helicases, which open up the double helix by breaking the ...
Tomas Lindahl - Nobel Lecture
Tomas Lindahl - Nobel Lecture

... events per day. This decay of the cellular DNA would lead to an unacceptable deleterious loss and alteration of genetic information. The answer to this dilemma must be that there is a correction mechanism. In a search for such mechanisms, we established that abasic sites can be removed and replaced ...
striking similarities in diverse telomerase proteins revealed by
striking similarities in diverse telomerase proteins revealed by

... presumably because these are multisubunit structures. The telomerase reverse transcriptase component, TERT, is generally thought to consist of four functional domains (see Figure 1): the essential N-terminal (TEN) domain, an RNA-binding domain (TRBD), reverse transcriptase (RT), and a C-terminal ext ...
Electrophoresis of DNA
Electrophoresis of DNA

... cuts DNA at a particular nucleotide sequence, acting like molecular scissors. For instance, one enzyme that you will use in this lab, EcoR I, cuts DNA at the sequence 5’-…GAATTC…-3’. This sequence of DNA is called the recognition site for EcoR I. Whenever EcoR I encounters this sequence in a strand ...
DNA - QuarkPhysics.ca
DNA - QuarkPhysics.ca

... functions of the body and cell to be carried out. Obviously, it is easier for enzymes to bind in the larger major groove.8 Note that A-T bonding is weaker than the C-G bonding since it only has two hydrogen bonds, so enzymes which unzip the DNA in order to work with it, typically begin at regions wi ...
Point Defects in Double Helix Induced by
Point Defects in Double Helix Induced by

... adsorbed on DNA and they interact from the side of double helix major groove and their average size is 1.5nm, we can conclude that the average distance between AgNPs adsorbed on DNA is nearly 60 nm (1 particle for about 170 base pairs). As soon as H3O+ reduction starts (as a result of AgNPs oxidatio ...
Missense mutations in the 3` end of the Escherichia
Missense mutations in the 3` end of the Escherichia

... DNA replication of a primase-dependent G4oriC-containingM I 3 phage derivative by quantitative competitive PCR (QC-PCR). The dnaG2903 strain converted the single-stranded DNA into double-stranded replicative form DNA at 42 O C . These results indicate that DnaG2903 retains primase activity at the re ...
Chapter 1
Chapter 1

... Mendel’s experiments showed that the genetic makeup of an organism, its genotype, determines the organism’s physical traits, its phenotype. However, his experiments did not show how genes are able to determine complex physical traits such as plant color or size. Archibald Garrod, an English physicia ...
Properties of Agarose
Properties of Agarose

... The intact holoenzyme is a 97K protein with three Zn(II) atoms in tertacysteine motifs near its carboxy-terminus. Topoisomerase I appears to reverse supercoiling by transiently breaking a segment of single-stranded DNA, passing an intact single- or double-stranded strand of DNA through the gate, the ...
lecture10
lecture10

... The intact holoenzyme is a 97K protein with three Zn(II) atoms in tertacysteine motifs near its carboxy-terminus. Topoisomerase I appears to reverse supercoiling by transiently breaking a segment of single-stranded DNA, passing an intact single- or double-stranded strand of DNA through the gate, the ...
DNA Structure - U of L Personal Web Sites
DNA Structure - U of L Personal Web Sites

... O3'-C3' () & C4'-C5' () torsion angles are restricted by nonhydrogen atoms attached to C3' & C4' C5'-O5' (), O5'-P () & P-O3' () are relatively free to rotate Additional restrictions due to presence of nucleobases ...
Molecular Biology Primer 2
Molecular Biology Primer 2

... • The phosphate group bonded to the 5' carbon atom of one deoxyribose is covalently bonded to the 3' carbon of the next. • The purine or pyrimidine attached to each deoxyribose projects in toward the axis of the helix. • Each base forms hydrogen bonds with the one directly opposite it, forming ...
3.8 DNA
3.8 DNA

... contains ALL of an organism’s genetic material and is therefore responsible for HEREDITY • A strand of DNA contains many GENES all of which code for PROTEINS • Each of these proteins has a different function in a cell ...
DNA - Ms Futch
DNA - Ms Futch

... for A and G-A-G becomes G-T-G, the “wrong” amino acid is placed in the protein (in this case: glutamine is replaced with valine). • As a result, the protein may not function correctly and this is the basis for many diseases and health issues. ...
Discussion and Analysis of DNA Structure while waiting:
Discussion and Analysis of DNA Structure while waiting:

... 4. Complete the following sentences to describe the structure of DNA. In the backbone of each strand in the DNA double helix molecule, the sugar of one nucleotide is bonded to the __________________ in the next nucleotide. The ______________________________ of the nucleotides in each strand of DNA c ...
Advancing Justice Through DNA Technology
Advancing Justice Through DNA Technology

... DNA/CSI Quiz True or false: • DNA results take 8 minutes. • DNA results can tell investigators what a suspect looks like. • All CSIs are good looking and solve crimes wearing Armani. • All CSIs drive Hummers, especially in Florida. ...
NPIDB: nucleic acid—protein interaction database | Nucleic Acids
NPIDB: nucleic acid—protein interaction database | Nucleic Acids

... and, second, the secondary structure elements involved in specific interaction with the main groove. At this step, a human judgement is essential in a number of cases because family representatives may vary in minor additional interactions. Thus, we have the following groups of families: (i) the main ...
Chapt 10
Chapt 10

... – The flow of information from gene to protein is based on a triplet code: the genetic instructions for the amino acid sequence of a polypeptide chain are written in DNA and RNA as a series of nonoverlapping three-base “words” called codons. – Translation involves switching from the nucleotide “lang ...
Sequence-specific RNA Photocleavage by Single
Sequence-specific RNA Photocleavage by Single

... substrate for the sequence-specific photocleavage has the frequency of one repeat in every 4 bp, which reveals the broad generality of this molecular tool with respect to different RNA sequence. The length of two binding arms of the DNA strand is variable and the catalytic efficiency would not be af ...
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Helicase



Helicases are a class of enzymes vital to all living organisms. Their main function is to unpackage an organism's genes. They are motor proteins that move directionally along a nucleic acid phosphodiester backbone, separating two annealed nucleic acid strands (i.e., DNA, RNA, or RNA-DNA hybrid) using energy derived from ATP hydrolysis. There are many helicases resulting from the great variety of processes in which strand separation must be catalyzed. Approximately 1% of eukaryotic genes code for helicases. The human genome codes for 95 non-redundant helicases: 64 RNA helicases and 31 DNA helicases. Many cellular processes, such as DNA replication, transcription, translation, recombination, DNA repair, and ribosome biogenesis involve the separation of nucleic acid strands that necessitates the use of helicases.
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