摘要:
When interferon gamma (IFNG) is produced in mammalian cell lines a heterogenous population of IFNG polypeptides is obtained due to C-terminal processing of the IFNG polypeptide. Clearly, this constitutes a severe problem in that valuable polypeptide material is lost and, further, it is necessary to carry out time-consuming and cumbersome purification in order to obtain a homogenous population of active IFNG polypeptides having the desired length. It has now been found that an IFNG fragment containing 132 amino acid residues (truncated at the nucleotide level by introducing a stop-codon after the codon encoding amino acid residue no. 132) does not undergo C-terminal truncation or, at least, is not significantly C-terminally truncated. Furthermore, as the IFNG fragment containing 132 amino acid residues is active, this opens up the possibility of producing a homogenous active IFNG polypeptide in eukaryotic host cells, such as CHO cells. More particularly, the present invention relates to an IFNG polypeptide variant exhibiting IFNG activity and having the amino acid sequence shown in SEQ ID NO:12. In a highly preferred embodiment of the invention, the variant comprises at least one further modification, such as 1-10 further modifications, relative to the amino acid sequence shown in SEQ ID NO:12. A particular preferred further modification is E38N+S40T.
摘要翻译:当在哺乳动物细胞系中产生干扰素γ(IFNG)时,由于IFNG多肽的C末端加工,获得IFNG多肽的异源群体。 显然,这构成了一个严重的问题,即有价值的多肽材料丢失,而且还需要进行耗时且繁琐的纯化,以获得具有所需长度的活性IFNG多肽的均质群体。 现在已经发现,含有132个氨基酸残基的IFNG片段(在编码氨基酸残基132号的密码子后通过引入终止密码子在核苷酸水平被截短)不经历C-末端截短,或至少是 不显着C末端截断。 此外,由于含有132个氨基酸残基的IFNG片段是有活性的,因此可以在真核宿主细胞如CHO细胞中产生均一的活性IFNG多肽。 更具体地,本发明涉及表现出IFNG活性且具有SEQ ID NO:12所示氨基酸序列的IFNG多肽变体。 在本发明的一个非常优选的实施方案中,相对于SEQ ID NO:12所示的氨基酸序列,变体包含至少一个其它修饰,例如1-10个其它修饰。 特别优选的进一步修改是E38N + S40T。
摘要:
When interferon gamma (IFNG) is produced in mammalian cell lines a heterogenous population of IFNG polypeptides is obtained due to C-terminal processing of the IFNG polypeptide. Clearly, this constitutes a severe problem in that valuable polypeptide material is lost and, further, it is necessary to carry out time-consuming and cumbersome purification in order to obtain a homogenous population of active IFNG polypeptides having the desired length. It has now been found that an IFNG fragment containing 132 amino acid residues (truncated at the nucleotide level by introducing a stop-codon after the codon encoding amino acid residue no. 132) does not undergo C-terminal truncation or, at least, is not significantly C-terminally truncated. Furthermore, as the IFNG fragment containing 132 amino acid residues is active, this opens up the possibility of producing a homogenous active IFNG polypeptide in eukaryotic host cells, such as CHO cells. More particularly, the present invention relates to an IFNG polypeptide variant exhibiting IFNG activity and having the amino acid sequence shown in SEQ ID NO:12. In a highly preferred embodiment of the invention, the variant comprises at least one further modification, such as 1-10 further modifications, relative to the amino acid sequence shown in SEQ ID NO:12. A particular preferred further modification is E38N+S40T.
摘要翻译:当在哺乳动物细胞系中产生干扰素γ(IFNG)时,由于IFNG多肽的C末端加工,获得IFNG多肽的异源群体。 显然,这构成了一个严重的问题,即有价值的多肽材料丢失,而且还需要进行耗时且繁琐的纯化,以获得具有所需长度的活性IFNG多肽的均质群体。 现在已经发现,含有132个氨基酸残基的IFNG片段(在编码氨基酸残基132号的密码子后通过引入终止密码子在核苷酸水平被截短)不经历C-末端截短,或至少是 不显着C末端截断。 此外,由于含有132个氨基酸残基的IFNG片段是有活性的,因此可以在真核宿主细胞如CHO细胞中产生均一的活性IFNG多肽。 更具体地,本发明涉及表现出IFNG活性且具有SEQ ID NO:12所示氨基酸序列的IFNG多肽变体。 在本发明的一个非常优选的实施方案中,相对于SEQ ID NO:12所示的氨基酸序列,变体包含至少一个其它修饰,例如1-10个其它修饰。 特别优选的进一步修改是E38N + S40T。
摘要:
The present invention relates to novel full-length interferon gamma (IFNG) polypeptide variants having interferon gamma activity. The full-length interferon gamma polypeptide variants of the invention are obtained by performing selected modifications in the C-terminal part of the molecule. The full-length interferon gamma polypeptide variants of the invention are useful in therapy, in particular for the treatment of interstitial pulmonary diseases, such as idiopathic pulmonary fibrosis.
摘要:
A conjugate exhibiting interferon gamma activity and comprising at least one first non-polypeptide moiety covalently linked to an IFG polypeptide, the polypeptide comprising an amino acid sequence that differs from that of a parent IFNG polypeptide in at least one introduced and/or at least one removed amino acid residue comprising an attachment group for the non-polypeptide moiety. The conjugate may be used for treatment of various diseases.
摘要:
A conjugate exhibiting interferon gamma activity and comprising at least one first non-polypeptide moiety covalently linked to an IFG polypeptide, the polypeptide comprising an amino acid sequence that differs from that of a parent IFNG polypeptide in at least one introduced and/or at least one removed amino acid residue comprising an attachment group for the non-polypeptide moiety. The conjugate may be used for treatment of various diseases.
摘要:
A conjugate exhibiting interferon gamma activity and comprising at least one first non-polypeptide moiety covalently linked to an IFG polypeptide, the polypeptide comprising an amino acid sequence that differs from that of a parent IFNG polypeptide in at least one introduced and/or at least one removed amino acid residue comprising an attachment group for the non-polypeptide moiety. The conjugate may be used for treatment of various diseases.
摘要:
Methods for producing polypeptide with altered immunogenicity or improved stability properties are disclosed. The methods involve a) expressing a diversified population of nucleotide sequences encoding a polypeptide of interest, b) screening the polypeptides expressed in step a) for function, immunogenicity and/or stability, c) selecting functional polypeptides having altered immunogenicity and/or increased stability, e.g. functional in vivo half-life as compared to the polypeptide of interest, and d) optionally subjecting the nucleotide sequence encoding the polypeptide selected in step c) to one or more repeated cycles of steps a)-c). In a further step the expressed polypeptides of step a) or c) can be conjugated to at least one non-polypeptide moiety.
摘要:
The present invention relates to a method for improving the properties of a cellulolytic enzyme by amino acid substitution, deletion or insertion, the method comprising the steps of: a. constructing a multiple alignment of at least two amino acid sequences known to have three-dimensional structures similar to endoglucanase V (EGV) from Humicola insolens known from Protein Data Bank entry 4ENG; b. constructing a homology-built three-dimensional structure of the cellulolytic enzyme based on the structure of the EGV; c. identifying amino acid residue positions present in a distance from the substrate binding cleft of not more than 5 Å; d. identifying surface-exposed amino acid residues of the enzyme; e. identifying all charged or potentially charged amino acid residue positions of the enzyme; f. choosing one or more positions wherein the amino acid residue is to be substituted, deleted or where an insertion is to be provided; and g. carrying out the substitution, deletion or insertion by using conventional protein engineering techniques. Also described are cellulase variants obtained by this method.
摘要:
Polypeptide conjugates with G-CSF activity comprising a polypeptide having at least one introduced lysine residue and at least one removed lysine residue compared to the sequence of human G-CSF, and which are conjugated to 2-6 polyethylene glycol moieties. The conjugates have a low in vitro bioactivity, a long in vivo half-life, a reduced receptor-mediated clearance, and provide a more rapid stimulation of production of white blood cells and neutrophils than non-conjugated recombinant human G-CSF.
摘要:
Conjugates of Factor VII (FVII) and Factor VIIa (FVIIA) are provided, as are methods for preparing them. Methods for producing novel polypeptides contributing to the production of such conjugates are provided. Methods of treatment by administering a FVII or FVIIa conjugate are provided.