GDP-mannose 6-dehydrogenase ALGD_AZOVI algD MRISIFGLGYVGAVCAGCLSGRGHEVVGVDISAAKIDMINQGKSPIVEPGLGELLAEGVKTGRLRGTTNVTEAVLATELSMLCVGTPSKLNGDLELDYIEEVCRQMGSALRDKTERHTVVVRSTVLPGTVHNVVIPILEEFSGKKAGVDFGVAVNPEFLRESTAIKDYNFPPMTVIGELDKASGRRLASIYAELDAPIVRKGIAVAEMIKYTCNVWHATKVTFANEIGNIAKAAGVDGREVMEVVCMDNKLNLSQYYMRPGLAFGGSCLPKDVSALSYRAHLWDIEAPLISSLMRSNAAQVQKAYDMIDKHGSRKVALLGLSFKAGTDDLRESPQLELAEMLIGKGFKLSIFDSNVEYARDHGANGHYIKNEIPHVSALLQSDLDKVVAEADVIVLGNADPRFEKLAKDVPAGKKVIDLVGFMPQRTAGAAEGICW Catalyzes the oxidation of guanosine diphospho-D-mannose (GDP-D-mannose) to GDP-D-mannuronic acid, a precursor for alginate polymerization. The alginate layer causes a mucoid phenotype and is essential for cyst formation. 436