Hansenula polymorpha gene coding for dolichyl-phosphate-mannose dependent alpha-1,3-mannosyltransferase and process for the production of recombinant glycoproteins with Hansenula polymorpha mutant strain deficient in the same gene

摘要

The present invention relates to a process for producing a human-type glycoprotein having reduced glycosylation by genetically manipulating an enzyme involved in glycosylation using a Hansenula polymorpha system. In detail, the present invention relates to a process for producing a human-type glycoprotein by identifying a dolichyl-phosphate-mannose dependent ¥á-1,3-mannosyltransferase gene from H. polymorpha, constructing a H. polymorpha mutant strain producing a glycoprotein exhibiting reduced glycosylation by disrupting the identified gene, and subjecting the mutant strain to various genetic manipulations for the synthesis of human-type glycan.