摘要:
A D-aminoacylase having a high substrate specificity is provided. This D-aminoacylase can produce D-amino acids from N-acetyl-D,L-amino acids conveniently and efficiently at a low cost. A D-aminoacylase produced by a microorganism of genus Defluvibacter; which acts on a N-acetyl-D-amino acid; which has a molecular weight (as determined by electrophoresis) of about 55,000 daltons, and an isoelectric point (as determined by two-dimensional electrophoresis for denatured system) of 5.3; which acts on N-acetyl-D-valine, N-acetyl-D-leucine, and the like, but not on N-acetyl-L-valine, N-acetyl-L-leucine, and the like; which has an optimal temperature of 37° C. (pH 8) and an optimal pH value of 8 to 8.5 at 37° C.; and whose activity is inhibited by Mn2+, Co2+, Ni2+, and Zn2+ each at 1 mmol/L, and by dithiothreitol, 2-mercaptoethanol, o-phenanthroline, and L-cysteine each at 5 mmol/L.
摘要:
A D-aminoacylase having a high substrate specificity is provided. This D-aminoacylase can produce D-amino acids from N-acetyl-D,L-amino acids conveniently and efficiently at a low cost. A D-aminoacylase produced by a microorganism of genus Defluvibacter; which acts on a N-acetyl-D-amino acid; which has a molecular weight (as determined by electrophoresis) of about 55,000 daltons, and an isoelectric point (as determined by two-dimensional electrophoresis for denatured system) of 5.3; which acts on N-acetyl-D-valine, N-acetyl-D-leucine, and the like, but not on N-acetyl-L-valine, N-acetyl-L-leucine, and the like; which has an optimal temperature of 37° C. (pH 8) and an optimal pH value of 8 to 8.5 at 37° C.; and whose activity is inhibited by Mn2+, Co2+, Ni2+, and Zn2+ each at 1 mmol/L, and by dithiothreitol, 2-mercaptoethanol, o-phenanthroline, and L-cysteine each at 5 mmol/L.
摘要:
A D-aminoacylase having a high substrate specificity is provided. This D-aminoacylase can produce D-amino acids from N-acetyl-D,L-amino acids conveniently and efficiently at a low cost.A D-aminoacylase produced by a microorganism of genus Defluvibacter; which acts on a N-acetyl-D-amino acid; which has a molecular weight (as determined by electrophoresis) of about 55,000 daltons, and an isoelectric point (as determined by two-dimensional electrophoresis for denatured system) of 5.3; which acts on N-acetyl-D-valine, N-acetyl-D-leucine, and the like, but not on N-acetyl-L-valine, N-acetyl-L-leucine, and the like; which has an optimal temperature of 37° C. (pH 8) and an optimal pH value of 8 to 8.5 at 37° C.; and whose activity is inhibited by Mn2+, Co2+, Ni2+, and Zn2+ each at 1 mmol/L, and by dithiothreitol, 2-mercaptoethanol, o-phenanthroline, and L-cysteine each at 5 mmol/L.
摘要:
The present invention provides an L-aminoacylase which is able to produce L-tert-leucine being useful as an intermediate for pharmaceuticals.A protein which is characterized in being represented by any of the following (a) to (d): (a) a protein coded by a gene consisting of a nucleic acid sequence shown in SEQ ID No: 1; (b) a protein consisting of an amino acid sequence shown in SEQ ID No: 2; (c) a protein coded by a polynucleotide which hybridizes under a stringent condition with a nucleic acid sequence which is complementary to the nucleic acid sequence shown in SEQ ID No: 1 and having an L-succinylaminoacylase activity; and (d) a protein which consists of an amino acid sequence where one or several amino acid (s) is/are substituted, deleted, inserted and/or added in the protein consisting of the amino acid sequence shown in SEQ ID No: 2 and has an L-succinylaminoacylase activity.
摘要翻译:本发明提供能够产生L-叔亮氨酸的L-氨基酸酰基酶,其可用作药物的中间体。 特征在于以下(a)〜(d)中任一项所示的蛋白质:(a)由由SEQ ID No:1所示的核酸序列组成的基因编码的蛋白质; (b)由SEQ ID No:2所示的氨基酸序列组成的蛋白质; (c)由严格条件下与SEQ ID No:1所示核酸序列互补且具有L-琥珀酰氨基酰化酶活性的核酸序列杂交的多核苷酸编码的蛋白质; 和(d)由氨基酸序列组成的蛋白质,其中一个或几个氨基酸被取代,缺失,插入和/或添加在由SEQ ID No:2所示的氨基酸序列组成的蛋白质中 并具有L-琥珀酰氨基酰化酶活性。
摘要:
The present invention provides a L-succinylacylase consisting of: (a) a protein coded by a gene consisting of a nucleic acid sequence shown in SEQ ID No: 1; (b) a protein consisting of an amino acid sequence shown in SEQ ID No: 2; (c) a protein coded by a polynucleotide which hybridizes under a stringent condition with a nucleic acid sequence which is complementary to the nucleic acid sequence shown in SEQ ID No: 1 and having an L-succinylaminoacylase activity; or (d) a protein which consists of an amino acid sequence where one or several amino acid(s) is/are substituted, deleted, inserted and/or added in the protein consisting of the amino acid sequence shown in SEQ ID No: 2 and has an L-succinylaminoacylase activity. This enzyme is able to produce a sterically bulky unnatural amino acid such as L-tert-leucine etc. which is useful as an intermediate for pharmaceuticals.
摘要翻译:本发明提供了一种L-琥珀酰基酰化酶,其由以下组成:(a)由由SEQ ID No:1所示的核酸序列组成的基因编码的蛋白质; (b)由SEQ ID No:2所示的氨基酸序列组成的蛋白质; (c)由严格条件下与SEQ ID No:1所示核酸序列互补且具有L-琥珀酰氨基酰化酶活性的核酸序列杂交的多核苷酸编码的蛋白质; 或(d)由氨基酸序列组成的蛋白质,其中一个或多个氨基酸被取代,缺失,插入和/或添加在由SEQ ID No:2所示的氨基酸序列组成的蛋白质中 并具有L-琥珀酰氨基酰化酶活性。 该酶能够产生空间庞大的非天然氨基酸如L-叔亮氨酸等,其可用作药物的中间体。
摘要:
The present invention provides a method for production of a single electron semiconductor element (SET) in which a quantum dot is selectively arranged in a nano gap between fine electrodes, whereby the product yield is significantly improved, leading to excellent practical applicability. The method for production of SET of the present invention is characterized in that a solution containing ferritin including a metal or semiconductor particle therein, and a nonionic surfactant is dropped on a substrate having a source electrode and a drain electrode formed by laminating a titanium film and a film of a metal other than titanium, whereby the ferritin is selectively arranged in a nano gap between the source electrode/drain electrode. In the method for production of SET of the present invention, the metal or semiconductor particle can be fixed as a quantum dot at a suitable position in the nano gap between the source electrode/drain electrode following decomposition of ferritin, and in addition, formation of unnecessary quantum dot can be suppressed.
摘要:
A microorganism holding carrier for a fluidized bed is provided that includes an extruded foamed article having continuous cells and independent cells. The article is composed of a polyolefin resin as a main component. The continuous cells include open-cells which are opened to at least two portions of a surface of the article and a semi-open cell which are opened to only one portion of the surface of the article. A ratio of the total volume of the continuous cells to the total volume of the extruded foamed article (a volume ratio of the continuous cells) falls within a range of from 20% to 70%. Further, a ratio of the total volume of the open-cells to the total volume of the continuous cells (a volume ratio of open-cells) is 20% or more. The article may have an apparent density of 0.90 to 1.80 g/cm.sup.3 and an apparent volume from 2.0.times.10.sup.-3 to 5.0 cm.sup.3, and be in the shape of a column, or a tube having an outer diameter of 2 to 20 mm and a thickness of 5 to 30% of the outer diameter. During foam-extruding, a cylinder temperature of 180.degree. C. to 250.degree. C. and a die temperature of 200.degree. C. to 250.degree. C. are preferred. The polyolefin resin may include additives such as an inorganic filler, a foaming agent, and a blowing assistant for controlling foaming temperature of the foaming agent.
摘要:
To provide a method of arranging ferritin by which a high rate of the number of the molecular film spots on which sole ferritin molecule was arranged in effect, with respect to total number of the molecular film spots provided for arranging ferritin (sole arrangement rate) is achieved is objected to. Specifically, in Fer8 ferritin having a sequence excluding 7 amino acids of from the second to the eighth, from an amino acid sequence (Fer0 sequence) translated from a naturally occurring DNA sequence, lysine at position 91 is substituted with glutamic acid.
摘要:
The present invention provides a method for production of a single electron semiconductor element (SET) in which a quantum dot is selectively arranged in a nano gap between fine electrodes, whereby the product yield is significantly improved, leading to excellent practical applicability. The method for production of SET of the present invention is characterized in that a solution containing ferritin including a metal or semiconductor particle therein, and a nonionic surfactant is dropped on a substrate having a source electrode and a drain electrode formed by laminating a titanium film and a film of a metal other than titanium, whereby the ferritin is selectively arranged in a nano gap between the source electrode/drain electrode.
摘要:
A transfer device includes an endless member caused to circulate by a driving unit, plural transfer members coming in contact with a rear surface of the endless member and transferring toner images on image holding members to the endless member, a support member movably supporting a specific transfer member of the transfer members located at a position which is more upstream in a circulation direction of the endless member than a contact position where a recording medium comes in contact with the endless member and which is closest to the contact position, a regulation member regulating the movement of the specific transfer member in a state where the specific transfer member is disposed at a position where the toner image formed on the corresponding image holding member is transferred to the endless member, and a first impelling member impelling the support member to the regulation member.