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L-丙氨酸置于alanine Racemase (176)Bsu40 From Bacillus Subtilis体系中,用 Aq. Buffer 作为反应溶剂,化学反应 0.01H,反应生成 D-丙氨酸
参考文献:Tris在枯草芽孢杆菌丙氨酸消旋酶中冷诱导的亚胺键裂解.
标题:Tris在枯草芽孢杆菌丙氨酸消旋酶中冷诱导的亚胺键裂解.
摘要:吡咯醛5'-磷酸(plp)是一种涉及多种酶促过程的通用辅助因子.大多数plp催化的反应(例如丙氨酸消旋体(alars)的反应)呈现一种常见的静止状态,其中plp与活性位点的赖氨酸共价结合以形成内部醛亚胺.在tris存在下生长的bsalar的晶体结构缺乏这种共价键,并且plp辅因子看起来是去甲酰化的.但是,Tris缓冲液中的活性丧失仅在进行酶促测定之前将溶液冷冻后发生.该证据有力地表明,Tris可以在零以下温度下进入活性位点,并起替代消旋酶底物的作用,从而导致基于机理的酶失活,附加的x射线结构和qm / Mm计算得出的理论结果所支持的假设.综上所述,我们的发现突出表明了广泛用于生化和生物物理实验中的常见缓冲液成分的作用可能未得到充分认识.
DOI:10.1039/c9Ob00223E

专利信息

专利号:US-6683189-B1
优先权日:1996-02-26
标 题 :Method for the synthesis of pyrrole and imidazole carboxamides on a solid support
发明人：DERVAN PETER B; BAIRD ELDON
权利人:CALIFORNIA INST OF TECHN
摘要:The present invention describes a novel method for the solid phase synthesis of polyamides containing imidazole and pyrrole carboxamides. The polyamides are prepared on a solid support from aromatic carboxylic acids and aromatic amines with high stepwise coupling yields (>99%), providing milligram quantities of highly pure polyamides. The present invention also describes the synthesis of analogs of the natural products Netropsin and Distamycin A, two antiviral antibiotics. The present invention also describes a novel method for the solid phase synthesis of imidazole and pyrrole carboxamide polyamide-oligonucleotide conjugates. This methodology will greatly increase both the complexity and quantity of minor-groove binding polyamides and minor-groove binding polyamide-oligonucleotide conjugates which can be synthesized and tested.

专利号:US-12421534-B2
优先权日:2021-11-10
标 题 :Engineered enzymes and method for the synthesis of diverse tyrosine analogs
发明人：ALMHJELL PATRICK J; ARNOLD FRANCES H
权利人:CALIFORNIA INST OF TECHN
摘要:Provided herein is an engineered tryptophan synthase β-subunit (TrpB) that catalyzes the synthesis of tyrosine, tyrosine analogs, or salts thereof. Also provided herein are methods for preparing tyrosine, tyrosine analogs, or a salt thereof using the engineered TrpB described herein.

专利号:US-7589170-B1
优先权日:1998-09-25
标题 :Synthesis of cyclic peptides
发明人：SMYTHE MARK LESLIE; MEUTERMANS WIM DENIS FRANS; BOURNE GREGORY THOMAS; MCGEARY ROSS PETER
权利人:UNIV QUEENSLAND
摘要:This invention relates to methods for preparing cyclic peptides and peptidomimetic compounds in solution and bound to solid supports, and to cyclic peptide or peptidomimetic libraries for use in drug screening programs. In particular, the invention relates to a generic strategy for synthesis of cyclic peptides or peptidomimetics that enables the efficient synthesis under mild conditions of a wide variety of desired compounds. Two approaches were evaluated for their improvements in solution and solid phase synthesis of small cyclic peptides: positioning reversible N-amide substituents in the sequence; and applying native ligation chemistry in an intramolecular sense. Systematic investigation of the effects of preorganising peptides prior to cyclisation by using peptide cyclisation auxiliaries, and developing new linkers and peptide cyclisation auxiliaries to aid cyclic peptide synthesis gives surprising improvements in both yields and purity of products compared to the prior art methods. The combination of these technologies provides a powerful generic approach for the solution and solid phase synthesis of small cyclic peptides. The ring contraction and N-amide substitution technology of the invention provide improved methods for the synthesis of cyclic peptides and peptidomimetics. When used in conjunction with linker strategies, this combination provides solid-phase avenues to cyclic peptides and peptidomimetics.

专利号:US-11873305-B2
优先权日:2020-06-30
标题 :Processes for synthesis of substituted indole intermediates for the synthesis of serd compounds
发明人：ZHANG HAIMING; XU JIE; WUITSCHIK GEORG; ANGELAUD REMY; HEROLD SEBASTIAN; STUTZ ALFRED; BRUETSCH TOBIAS; BURKHARD JOHANNES
权利人:GENENTECH INC; HOFFMANN LA ROCHE
摘要:Provided herein are processes for the preparation of indolyl intermediates using Wenker Synthesis for the total synthesis of SERD compounds useful in the treatment of cancer.

专利号:WO-2023030277-A1
优先权日:2021-08-30
标 题:Method for fully liquid-phase synthesis of grnh nonapeptide amide analog
发明人：SUN PENGCHENG; PAN JING; WU JUNYONG; TANG YONGBO; Du Yixiong; GUO LIN
权利人:HUNAN MICRO PEPTIDE BIOMEDICAL CO LTD
摘要:Provided is a method for fully liquid-phase synthesis of a GRnH nonapeptide amide analog, which belongs to the technical field of medicine synthesis. The method comprises respectively synthesizing a 'Trp-Ser-Tyr' fragment, an 'R-Leu' fragment, a 'Pyr-His' fragment and 'Arg-Pro-Hunan T', wherein, R = D-Ala (alarelin), D-Leu (leuprorelin), D-Trp (deslorelin) and D-His (histrelin), and obtaining the GRnH nonapeptide amide analog with high yield and high purity by means of a '3 +2 +2 +2' fragment condensation method. The synthesis method is environmentally friendly, mild, and free of any highly toxic and poisonable reagents. The cost is greatly reduced and the synthesis method is very suitable for large-scale production.

专利号:US-6774259-B2
优先权日:2000-04-11
标 题 :Method for synthesis of n-[(s)]-1-carboxybutyl-(s)-alanine esters and use in synthesis of perindopril
发明人：SOUVIE JEAN-CLAUDE; RENAUD ALAIN
权利人:SERVIER LAB
摘要:A stereoselective process for the industrial synthesis of compounds of formula (I):wherein R represents linear or branched (C1-C6)alkyl, andapplication in the synthesis of perindopril and pharmaceutically acceptable salts thereof.