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In organic chemistry, a peptide bond is an amide type of covalent chemical bond linking two consecutive alpha-amino acids from C1 of one alpha-amino acid and N2 of another, along a peptide or protein chain.
The TIM barrel, also known as an alpha/beta barrel, is a conserved protein fold consisting of eight alpha helices (α-helices) and eight parallel beta strands (β-strands) that alternate along the peptide backbone. The structure is named after triose-phosphate isomerase, a conserved metabolic enzyme. TIM barrels are ubiquitous, with approximately 10% of all enzymes adopting this fold. Further, five of seven enzyme commission (EC) enzyme classes include TIM barrel proteins. The TIM barrel fold is evolutionarily ancient, with many of its members possessing little similarity today, instead falling within the twilight zone of sequence similarity.
β-Amylase is an enzyme with the systematic name 4-α-D-glucan maltohydrolase. It catalyses the following reaction:
Trifunctional enzyme subunit beta, mitochondrial (TP-beta) also known as 3-ketoacyl-CoA thiolase, acetyl-CoA acyltransferase, or beta-ketothiolase is an enzyme that in humans is encoded by the HADHB gene.
Decaprenylphospho-beta-D-erythro-pentofuranosid-2-ulose 2-reductase (EC 1.1.1.333, decaprenylphospho-beta-D-ribofuranose 2'-epimerase, Rv3791, DprE2) is an enzyme with systematic name trans,octacis-decaprenylphospho-beta-D-arabinofuranose:NAD+ 2-oxidoreductase. This enzyme catalyses the following chemical reaction
Decaprenylphospho-beta-D-ribofuranose 2-oxidase (EC 1.1.98.3, decaprenylphosphoryl-beta-D-ribofuranose 2'-epimerase, Rv3790, DprE1) is an enzyme with systematic name trans,octacis-decaprenylphospho-beta-D-ribofuranose:FAD 2-oxidoreductase. This enzyme catalyses the following chemical reaction
GlcA-beta-(1->2)-D-Man-alpha-(1->3)-D-Glc-beta-(1->4)-D-Glc-alpha-1-diphospho-ditrans,octacis-undecaprenol 4-beta-mannosyltransferase is an enzyme with systematic name GDP-mannose:GlcA-beta-(1->2)-D-Man-alpha-(1->3)-D-Glc-beta-(1->4)-D-Glc-alpha-1-diphospho-ditrans,octacis-undecaprenol 4-beta-mannosyltransferase. This enzyme catalyses the following chemical reaction
GDP-mannose:cellobiosyl-diphosphopolyprenol alpha-mannosyltransferase is an enzyme with systematic name GDP-mannose:D-Glc-beta-(1->4)-Glc-alpha-1-diphospho-ditrans,octacis-undecaprenol 3-alpha-mannosyltransferase . This enzyme catalyses the following chemical reaction
D-Man-alpha-(1->3) -D-Glc-beta-(1->4) -D-Glc-alpha-1-diphosphoundecaprenol 2-beta-glucuronyltransferase is an enzyme with the systematic name UDP-glucuronate: D-Man-alpha-(1->3) -D-Glc-beta-(1->4)-D-Glc-alpha-1-diphospho-ditrans,octacis-undecaprenol beta-1,2-glucuronyltransferase. This enzyme catalyses the following chemical reaction:
Glucosyl-3-phosphoglycerate synthase is an enzyme with systematic name NDP-glucose:3-phospho-D-glycerate 2-alpha-D-glucosyltransferase. This enzyme catalyses the following chemical reaction
Rhamnopyranosyl-N-acetylglucosaminyl-diphospho-decaprenol beta-1,3/1,4-galactofuranosyltransferase is an enzyme with systematic name UDP-alpha-D-galactofuranose:alpha-L-rhamnopyranosyl-(1->3)-N-acetyl-alpha-D-glucosaminyl-diphospho-trans,octacis-decaprenol 3-beta/4-beta-galactofuranosyltransferase. This enzyme catalyses the following chemical reaction
Galactofuranosylgalactofuranosylrhamnosyl-N-acetylglucosaminyl-diphospho-decaprenol beta-1,5/1,6-galactofuranosyltransferase is an enzyme with systematic name UDP-alpha-D-galactofuranose:beta-D-galactofuranosyl-(1->5)-beta-D-galactofuranosyl-(1->4)-alpha-L-rhamnopyranosyl-(1->3)-N-acetyl-alpha-D-glucosaminyl-diphospho-trans,octacis-decaprenol 4-beta/5-beta-D-galactofuranosyltransferase. This enzyme catalyses the following chemical reaction
N-acetylglucosaminyl-diphospho-decaprenol L-rhamnosyltransferase is an enzyme with systematic name dTDP-6-deoxy-beta-L-mannose:N-acetyl-alpha-D-glucosaminyl-diphospho-trans,octacis-decaprenol 3-alpha-L-rhamnosyltransferase. This enzyme catalyses the following chemical reaction
Lipid IVA 4-amino-4-deoxy-L-arabinosyltransferase is an enzyme with systematic name 4-amino-4-deoxy-alpha-L-arabinopyranosyl ditrans, octacis-undecaprenyl phosphate:lipid IVA 4-amino-4-deoxy-L-arabinopyranosyltransferase. This enzyme catalyses the following chemical reaction
Decaprenyl-phosphate phosphoribosyltransferase is an enzyme with systematic name trans,octacis-decaprenylphospho-beta-D-ribofuranose 5-phosphate:diphosphate phospho-alpha-D-ribosyltransferase. This enzyme catalyses the following chemical reaction
Galactan 5-O-arabinofuranosyltransferase is an enzyme with systematic name galactofuranan:trans,octacis-decaprenylphospho-beta-D-arabinofuranose 5-O-alpha-D-arabinofuranosyltransferase. This enzyme catalyses the following chemical reaction
Trans,polycis-decaprenyl diphosphate synthase is an enzyme with systematic name (2Z,6E)-farnesyl-diphosphate:isopentenyl-diphosphate farnesylcistransferase . This enzyme catalyses the following chemical reaction
Xanthan ketal pyruvate transferase is an enzyme with systematic name phosphoenolpyruvate:D-Man-beta-(1->4)-GlcA-beta-(1->2)-D-Man-alpha-(1->3)-D-Glc-beta-(1->4)-D-Glc-alpha-1-diphospho-ditrans,octacis-undecaprenol 4,6-O-(1-carboxyethan-1,1-diyl)transferase. This enzyme catalyses the following chemical reaction
UDP-N-acetylglucosamine—undecaprenyl-phosphate N-acetylglucosaminephosphotransferase is an enzyme with systematic name UDP-N-acetyl-alpha-D-glucosamine:ditrans,octacis-undecaprenyl phosphate N-acetyl-alpha-D-glucosaminephosphotransferase. This enzyme catalyses the following chemical reaction
Endo-α-N-acetylgalactosaminidase (EC 3.2.1.97, endo-α-acetylgalactosaminidase, endo-α-N-acetyl-D-galactosaminidase, mucinaminylserine mucinaminidase, D-galactosyl-3-(N-acetyl-α-D-galactosaminyl)-L-serine mucinaminohydrolase, endo-α-GalNAc-ase, D-galactosyl-N-acetyl-α-D-galactosamine D-galactosyl-N-acetyl-galactosaminohydrolase) is an enzyme with systematic name glycopeptide-D-galactosyl-N-acetyl-α-D-galactosamine D-galactosyl-N-acetyl-galactosaminohydrolase. This enzyme catalyses the following chemical reaction
References
- ↑ Birch HL, Alderwick LJ, Bhatt A, Rittmann D, Krumbach K, Singh A, Bai Y, Lowary TL, Eggeling L, Besra GS (September 2008). "Biosynthesis of mycobacterial arabinogalactan: identification of a novel alpha(1-->3) arabinofuranosyltransferase". Molecular Microbiology. 69 (5): 1191–206. doi:10.1111/j.1365-2958.2008.06354.x. PMC 2610374 . PMID 18627460.
- ↑ Zhang J, Angala SK, Pramanik PK, Li K, Crick DC, Liav A, Jozwiak A, Swiezewska E, Jackson M, Chatterjee D (August 2011). "Reconstitution of functional mycobacterial arabinosyltransferase AftC proteoliposome and assessment of decaprenylphosphorylarabinose analogues as arabinofuranosyl donors". ACS Chemical Biology. 6 (8): 819–28. doi:10.1021/cb200091m. PMC 3158817 . PMID 21595486.
