Tosoh Corporation

Sagami Chemical Research Institute

Rational Drug Design Laboratories

Teruhiko Ide

Toru Tanaka

Hiroyuki Watanabe

Yoshiharu Asaoka

Kenji Tsuzuki

Hiroshi Iida

Kiyoshi Yasukawa

Yosuke Terao

Yasuaki Hanasaki

Naoki Yamanaka

Takumi Tokunaga

Shigeo Tsuchiya

Kimio Katsuura

Teiji Ekida

Harutaka Yagame

Kouta Hatayama

Masatoshi Fujiwara

Hiroshi Sato

Hiroyuki Ito

Masanori Baba

Satoshi Endo

Shiro Shigeta

Hiromitsu Takayama

Seigo Oe

Satoshi Hanzawa

Natsuko Kizu

Toshinobu Toyoshima

Tomoyuki Yokota

Shin-ichiro Sakai

Katsushi Ijichi

Masaru Aoki

Kei-ichi Murayama

Seigou Oe

Yasuhito Takasu

Toru Imaizumi

The problem to be addressed by the present invention is to provide improved recombinant Fc&#x3b3;RIIb and Fc&#x3b3;RIIa that do not require refolding and exhibit high productivity and thermal stability, and to provide a method for producing the same. Said problem is solved by improved recombinant Fc&#x3b3;RIIb comprising at least the amino acid residues of the extracellular domain of human Fc&#x3b3;RIIb (No. 43 to No. 215 in UniProt No. P31994), wherein, in said amino acid residues, at least one amino acid substitution has occurred at a position corresponding to No. 82, 94, 98, 104, 105, or 139 in UniProt No. P31994. Said problem is also solved by improved recombinant Fc&#x3b3;RIIa comprising at least the amino acid residues of the extracellular domain of human Fc&#x3b3;RIIa (No. 34 to No. 206 in UniProt No. P12318-1), wherein, in said amino acid residues, at least one amino acid substitution has occurred at a position corresponding to No. 73, 85, 89, 95, 96, or 130 in UniProt No. P12318-1.

Recombinant Fc&#x3b3;RII

Provided are: an Fc-binding protein having improved stability, particularly to heat and acid; a method for producing the protein; an antibody adsorbent using the protein; and a method for separating the antibodies using the adsorbent. Specifically provided are: an Fc-binding protein having improved stability to heat and acid, achieved by substituting an amino-acid residue in a specific position in the extracellular region of human FcyRIIIa with another specific amino acid; a method for producing the protein; an antibody adsorbent using the protein; and a method for separating the antibodies using the adsorbent.

Fc-binding protein, method for producing said protein, antibody adsorbent using said protein, and method for separating antibody using said adsorbent

The present invention addresses the first problem of providing an Fc-binding protein having improved stability, especially stability to heat and acid, of the Fc-binding protein, a method for producing this protein, and an antibody adsorbent using this protein. The present invention also addresses the second problem of providing a method that makes it possible to identify the presence or absence of glycosylation of an antibody, and a material to be used in this method. The first problem is solved by an Fc-binding protein having improved stability to heat and acid obtained by substituting amino acid residues at specific positions in the extracellular domain within human Fc&#x3b3;RIIIa with other specific amino acids, a method for producing this protein, and an antibody adsorbent using this protein. The second problem is solved by using an adsorbent capable of specifically adsorbing an antibody having a sugar chain, the adsorbent being obtained by immobilizing human Fc&#x3b3;RIIIa on an insoluble carrier.

Fc-binding protein, method for producing said protein, and antibody adsorbent using said protein, and methods for purifying and identifying antibody using said adsorbent

Disclosed are: an Fc binding protein having increased stability with respect to heat, acid, and/or alkalinity compared with the wild type; a method for producing same; and a method for specifically isolating protein containing an Fc binding protein binding site using said Fc binding protein as a ligand for affinity chromatography. An Fc binding protein was obtained having increased stability with respect to heat, acid, and/or alkalinity compared with the wild-type human Fc receptor by means of substituting at least one specific amino acid residue in the extracellular domain of the wild-type human Fc receptor with another amino acid residue. The Fc binding protein is useful as a ligand for affinity chromatography for example by immobilizing in a solid phase. Also, when the Fc binding protein is expressed using a host that has been transformed with an expression vector containing a polynucleotide coding for said protein, the amount of produced protein is increased compared with using a wild-type human Fc receptor.

FC binding protein and method for manufacturing same

A method for producing a carotenoid comprising the steps of cultivating a cell transformed with a DNA sequence comprising a DNA sequence depicted in anyone of SEQ ID NOs: 2-7 or a cell transformed with a vector having a DNA sequence depicted in anyone of SEQ ID NOs: 2-7 under proper culture conditions and isolating the carotenoid from the cell or the culture.

Method for production of carotenoid-synthesizing microorganism and method for production of carotenoid

A carotenoid producing bacterium belonging to the genusthat selectively produces canthaxanthin so that the amount thereof is not less than 90 percent by weight of the total amount of produced carotenoids including &#x3b2;-carotene, &#x3b2;-cryptoxanthin, echinenone, canthaxanthin, 3-hydroxyechinenone, 3'-hydroxyechinenone, zeaxanthin, phoenicoxanthin, adonixanthin, and astaxanthin. A method for producing canthaxanthin by culturing the above bacterium, and then collecting carotenoids from bacterial cells or a culture solution after the culturing.

Microorganism and method for producing canthaxanthin

Disclosed is a T7 RNA polymerase mutant having improved thermal stability and/or specific activity in comparison with wild-type T7-like bacteriophage RNA polymerase, wherein at least one amino acid residue corresponding to at least one of the amino acid residues selected from the group at least consisting of glutamine at position 768, lysine at position 179 and valine at position 685 of the amino acid sequence that composes wild-type T7 RNA polymerase shown in SEQ ID NO: 6, is substituted with another amino acid.

RNA polymerase mutant with improved functions

To provide a microorganism capable of producing a large amount of carotenoids, mainly astaxanthin, and to provide a method of producing carotenoids using the microorganism, a microorganism having improved carotenoid productivity is used, which is obtainable by breeding a carotenoid producingbacteria which is featured by producing 720 mg or more carotenoid per 1 L of culture medium. Also used is a method of producing carotenoids using the bacterium.

Microorganism and method for producing carotenoid using the same

Microorganism and method for producing carotenoid using it

The present invention intends to provide an IL-6R.IL-6 fusion protein and the like in which IL-6R and IL-6 are directly linked without a linker. The IL-6 receptor.IL-6 fusion protein of the present invention has a structure in which one amino acid residue constituting IL-6 receptor and one amino acid residue constituting IL-6 are directly bonded.

Polynucleotide encoding IL-6 receptor/IL-6 fusion protein

The present invention intends to provide an IL-6R&#x2022;IL-6 fusion protein and the like in which IL-6R and IL-6 are directly linked without a linker. The IL-6 receptor&#x2022;IL-6 fusion protein of the present invention has a structure in which one amino acid residue constituting IL-6 receptor and one amino acid residue constituting IL-6 are directly bonded.

IL-6 receptor&#x2022;IL-6 direct fusion protein

Arylthiadiazole derivative and antiviral agent containing the same

Disclosed is (a) 1,2,5-thiadiazole derivatives represented by the following formulae [I] or [III]: ##STR1## wherein X and Y are the same or different and each represents a hydrogen atom, a halogen atom, an alkyl group having from 1 to 6 carbon atoms, an alkoxy group having from 1 to 4 carbon atoms, a nitro group, a trifluoromethyl group, a carboxyl group, an alkoxycarbonyl group having from 2 to 5 carbon atoms, a naphthyl group or a tetrahydronaphthyl group; and A represents an alkyl group having from 1 to 6 carbon atoms, --C(.dbd.O)OR.sup.1, --C(.dbd.O)NR.sup.2 R.sup.3, a phenyl group which may be substituted by at least one of an alkyl group having from 1 to 6 carbon atoms and an alkoxy group having from 1 to 4 carbon atoms, --CHR.sup.4 C(.dbd.O)R.sup.5 or --C(.dbd.O)R.sup.6, in which R.sup.1 represents an alkyl group having from 1 to 6 carbon atoms, R.sup.2 and R.sup.3 are the same or different and each represents a hydrogen atom or an alkyl group having from 1 to 6 carbon atoms, R.sup.4 represents a hydrogen atom or an alkyl group having from 1 to 4 carbon atoms, R.sup.5 represents an alkoxy group having from 1 to 4 carbon atoms or an amino group which may be substituted by at least one of an alkyl group having from 1 to 4 carbon atoms and a phenyl group which may be substituted by at least one halogen atom, and R.sup.6 represents an alkyl group having from 1 to 6 carbon atoms, (b) a process for producing the compound represented by formula [I] and (c) an agricultural and horticultural fungicide comprising the compound represented by formula [III].

Thiadiazole derivative, process for producing it and agricultural and

Tetrahydroisoquinoline derivatives useful as fungicides are disclosed of formula [I]: ##STR1## wherein R.sup.1 represents C.sub.1 -C.sub.5 linear or branched alkyl, C.sub.2 -C.sub.5 linear or branched alkenyl, C.sub.2 -C.sub.5 linear or branched alkynyl; R.sup.2, R.sup.3, R.sup.4, R.sup.5 and R.sup.6, the same or different, represent hydrogen, C.sub.1 -C.sub.10 linear or branched alkyl, C.sub.3 -C.sub.10 linear or branched alkenyl, C.sub.2 -C.sub.10 linear or branched alkynyl, C.sub.1 -C.sub.10 linear or branched alkoxy, C.sub.2 -C.sub.10 linear or branched alkenyloxy, C.sub.2 -C.sub.10 linear or branched alkynyloxy, benzyloxy, hydroxy, haloalkyl, amino, mono- or di-substituted amino substituted with C.sub.1 -C.sub.4 linear or branched alkyl, phenyl or halogen; R.sup.2 and R.sup.3 may be bonded through a group of the formula --O--CH.sub.2).sub.m O-- wherein m represents integer of 1 or 2 or --CH.dbd.CH).sub.2 to form a ring; and R.sup.4 and R.sup.5 may be bonded through a group of the formula --O--CH.sub.2).sub.m O-- wherein m represents an integer of 1 or 2 or --CH.dbd.CH).sub.2 -- to form a ring.

Tetrahydroisoquinoline derivatives, processes for producing the same and

Tetrahydroisoquinoline derivatives of the following formula [I] and acid addition salts thereof, and ##STR1## (wherein in all of these formulae, R.sup.1 represents C.sub.1 -C.sub.5 straight or branched alkyl, C.sub.2 -C.sub.5 straight or branched alkenyl or C.sub.2 -C.sub.5 straight or branched alkynyl; R.sup.2 represents hydrogen atom, C.sub.1 -C.sub.10 straight or branched alkyl, C.sub.2 -C.sub.10 straight or branched alkenyl, C.sub.2 -C.sub.10 straight or branched alkynyl, C.sub.1 -C.sub.10 straight or branched alkoxy, C.sub.2 -C.sub.10 straight or branched alkenyloxy, C.sub.2 -C.sub.10 straight or branched alkynyloxy, or C.sub.1 -C.sub.10 straight or branched halogenated alkyl; R.sup.3, R.sup.4 R.sup.5 and R.sup.6, the same or different represent hydrogen atom, C.sub.1 -C.sub.10 straight or branched alkyl, C.sub.2 -C.sub.10 straight or branched alkenyl, C.sub.2 -C.sub.10 straight or branched alkynyl, C.sub.1 -C.sub.10 straight or branched alkoxy, C.sub.2 -C.sub.10 straight or branched alkenyloxy, C.sub.2 -C.sub.10 straight or branched alkynyloxy or halogen atom, with the proviso that R.sup.3, R.sup.4, R.sup.5 and R.sup.6 are not hydrogen atoms simultaneously).

Tetrahydroisoquinoline compounds and fungicides containing the same

Growing community of inventors

Kanagawa, Japan

Teruhiko Ide