Ligases

Bài giảng "Công nghệ di truyền - Chương 3: Simple cloning" cung cấp cho người học các kiến thức: Vector pUC, vai trò của các gene, cắt vector và DNA, nối bằng ligase được, chuyển tất cả cấu trúc vào E.coli, Operon lacZ và IPTG, chọn dòng mang DNA tái tổ hợp,... Mời các bạn cùng tham khảo nội dung chi tiết.

55p doinhugiobay_10 12-01-2016 111 19   Download

Bài giảng "Simple cloning" cung cấp cho người học các kiến thức: Vector pUC, vai trò của các gene, cấu trúc của các gen, cắt vector và DNA, nối bằng ligase được, chuyển tất cả cấu trúc vào E.coli, chọn dòng mang DNA tái tổ hợp, vector nhân tạo đầu tiên, tế bào chủ, tính chất của tế bào chủ, nhân dòng sản phẩm PCR,... Mời các bạn cùng tham khảo.

55p doinhugiobay_12 15-01-2016 56 5   Download

Luận án Tiến sĩ Y học "Nghiên cứu đặc điểm lâm sàng, cận lâm sàng và kiểu gen của Chlamydia trachomatis ở phụ nữ vô sinh tại Bệnh viện Phụ sản Trung ương (2020-2021)" trình bày các nội dung chính sau: Mô tả một số đặc điểm lâm sàng, cận lâm sàng và yếu tố liên quan tới tình trạng nhiễm C. trachomatis ở phụ nữ vô sinh đến khám, điều trị tại Bệnh viện Phụ sản Trung ương (2020-2021); Xác định kiểu gen của C. trachomatis phân lập được từ đối tượng nghiên cứu.

189p vilazada 02-02-2024 14 4   Download

A novel vector platform for vitamin H-inducible transgene expression in mammalian cells have therefore designed a strategy to convert antibiotic-responsive transcription factors into gene regulation systems responsive to non-toxic biotin, also known as vitamin H.

9p thuyancn 01-06-2015 44 5   Download

4-Coumarate:CoA ligase (4CL) is involved in the formation of coenzyme A thioesters of hydroxycinnamic acids that are central substrates for subsequent condensation, reduction, and transfer reactions in the biosynthesis of plant phenylpropanoids. Previous studies of 4CL appear to suggest that many isoenzymes are functionally equivalent in supplying substrates to various subsequent branches of phenylpropanoid biosyntheses. In contrast, divergent members of a 4CL gene family were identified in soybean (Glycine max L.).

12p research12 01-06-2013 54 5   Download

Murine double minute 2 (MDM2) protein exhibits many diverse biochemi-cal functions on the tumour suppressor protein p53, including transcrip-tional suppression and E3 ubiquitin ligase activity. However, more recent data have shown that MDM2 can exhibit ATP-dependent molecular chap-erone activity and directly mediate folding of the p53 tetramer. Analysing the ATP-dependent function of MDM2 will provide novel insights into the evolution and function of the protein.

12p research12 29-04-2013 61 4   Download

A novel plasmid vector pSELECT-1 is described which can be used for highly efficient site-directed in vitro mutagenesis. The mutagenesis method is based on the use of single-stranded DNA and two primers, one mutagenic primer and a second correction primer which corrects a defect in the ampicillin resistance gene on the vector and reverts the vector to ampicillin resistance. Using T4 DNA polymerase and T4 DNA ligase the two primers are physically linked on the template. The non-mutant DNA strand is selected against by growth in the presence of ampicillin.

5p zingzing09 24-04-2013 62 5   Download

We have previously identi®ed a DNA ligase (LigTk)froma hyperthermophilic archaeon,Thermococcus kodakaraensis KOD1. The enzyme is the only characterized ATP-depend-ent DNA ligase from a hyperthermophile, and allows the analysis of enzymatic DNA ligation reactions at tempera-tures above themeltingpoint of the substrates.Herewe have focused on the interactions of LigTkwith various DNA substrates, and its speci®cities toward metal cations.

7p research12 23-04-2013 34 2   Download

DNA ligases are the enzymes responsible for the repair of single-strandedanddouble-strandednicks indsDNA.DNA ligases are structurally similar, possibly sharing a common molecular mechanism of nick recognition and ligation catalysis. This mechanism remains unclear, in part because the structure of ligase in complex with dsDNAhas yet to be solved.DNA ligases share common structural elementswith DNA polymerases, which have been cocrystallized with dsDNA. Based on the observed DNA polymerase–dsDNA interactions, we propose a mechanism for recognition of a single-stranded nick by DNA ligase....

7p tumor12 22-04-2013 40 2   Download

The C-terminus of thea-chain of tubulin is subject to reversible incorporationof tyrosineby tubulin tyrosine ligase and removal by tubulin carboxypeptidase. Thus, microtu-bules rich in either tyrosinated or detyrosinated tubulin can coexist in the cell. Substitution of the terminal tyrosine by 3-nitrotyrosine has been claimed to cause microtubule dys-function and consequent injury of epithelial lung carcinoma A549 cells. Nitrotyrosine is formed in cells by nitration of tyrosine by nitric oxide-derived species....

9p tumor12 22-04-2013 31 2   Download

T4DNA ligase is an Mg 2+ -dependent andATP-dependent enzyme that seals DNA nicks in three steps: it covalently binds AMP,transadenylates the nick phosphate,and cata-lyses formation of the phosphodiester bond releasing AMP.

11p tumor12 20-04-2013 45 7   Download

Biotin protein ligase (BPL) catalyses the biotinylation of the biotin carboxyl carrier protein (BCCP) subunit of acetyl CoAcarboxylase and this post-translational modificationof a single lysine residue is exceptionally specific. The exact details of the protein–protein interactions involved are unclear as a BPL:BCCP complex has not yet been isolated. Moreover, detailed information is lacking on the composi-tion, biosynthesis and role of fatty acids in hyperthermo-philic organisms.

11p tumor12 20-04-2013 34 2   Download

The surface charge as well as the electrochemical properties and ligand binding abilities of the Gram-positive cell wall is controlled by the d-alanylation of the lipoteichoic acid. The incorporation of d-Ala into lipoteichoic acid requires the d-alanine:d-alanyl carrier protein ligase (DltA) and the carrier protein (DltC). We have heterologously expressed, purified, and assayed the substrate selectivity of the recombinant proteins DltA with its substrate DltC.

11p awards 06-04-2013 40 5   Download

T4 DNA ligase is one of the workhorses of molecular biology and used in various biotechnological applications. Here we report that this ligase, unlikeEscherichia coliDNA ligase,TaqDNA ligase and Ampligase, is able to join the ends of single-stranded DNA in the absence of any duplex DNA structure at the ligation site.

10p dell39 27-03-2013 44 3   Download

The suppressors of cytokine signalling (SOCS) proteins inhibit cytokine signalling by direct interaction with Janus kinases (JAKs) or activated cytokine receptors. In addition to the N-ter-minal and SH2 domains that mediate these interactions, SOCS proteins contain a C-terminal SOCS box. Evidence suggests SOCS box-containing proteins act as part of an elongin-cullin-SOCS (ECS) E3 ubiquitin ligase complex, marking target pro-teins for degradation.

35p inspiron33 26-03-2013 58 6   Download

Cbl is an adaptor protein and ubiquitin ligase that binds and is phosphory-lated by the nonreceptor tyrosine kinase Src. We previously showed that the primary interaction between Src and Cbl is mediated by the Src homology domain 3 (SH3) of Src binding to proline-rich sequences of Cbl.

15p inspiron33 23-03-2013 38 4   Download

Potassium channel tetramerization domain (KCTD) proteins contain a bric-a-brac, tramtrak and broad complex (BTB) domain that is most simi-lar to the tetramerization domain (T1) of voltage-gated potassium chan-nels.

11p galaxyss3 07-03-2013 40 3   Download

HIV-1 efficiently infects susceptible cells and causes AIDS in humans. Although HIV can also enter the cells of Old World monkeys, it encoun-ters a block before reverse transcription. Data have shown that this species-specific restriction is mediated by tripartite motif (TRIM)5a, whose molecular function is still undefined.

16p media19 06-03-2013 51 4   Download

The tumor suppressor von Hippel–Lindau (VHL) gene product forms a com-plex with elongin B and elongin C, and acts as a recognition subunit of a ubiquitin E3 ligase. Interactions between components in the complex were investigated in living cells by fluorescence resonance energy transfer (FRET)–fluorescence lifetime imaging microscopy (FLIM).

9p media19 04-03-2013 42 2   Download

Glutathionylspermidine is an intermediate formed in the biosynthesis of trypanothione, an essential metabolite in defence against chemical and oxi-dative stress in the Kinetoplastida. The kinetic mechanism for glutathionyl-spermidine synthetase (EC 6.3.1.8) from Crithidia fasciculata (CfGspS) obeys a rapid equilibrium random ter-ter model with kinetic constants KGSH= 609lm, KSpd= 157lmand KATP= 215lm.

14p vinaphone15 28-02-2013 56 5   Download