>cd06434 GT2_HAS Hyaluronan synthases catalyze polymerization of hyaluronan. Hyaluronan synthases (HASs) are bi-functional glycosyltransferases that catalyze polymerization of hyaluronan. HASs transfer both GlcUA and GlcNAc in beta-(1,3) and beta-(1,4) linkages, respectively to the hyaluronan chain using UDP-GlcNAc and UDP-GlcUA as substrates. HA is made as a free glycan, not attached to a protein or lipid. HASs do not need a primer for HA synthesis; they initiate HA biosynthesis de novo with only UDP-GlcNAc, UDP-GlcUA, and Mg2+. Hyaluronan (HA) is a linear heteropolysaccharide composed of (1-3)-linked beta-D-GlcUA-beta-D-GlcNAc disaccharide repeats. It can be found in vertebrates and a few microbes and is typically on the cell surface or in the extracellular space, but is also found inside mammalian cells. Hyaluronan has several physiochemical and biological functions such as space filling, lubrication, and providing a hydrated matrix through which cells can migrate.

Probab=99.91 E-value=9.8e-24 Score=163.66 Aligned_cols=195 Identities=18% Similarity=0.191 Sum_probs=133.5 Q ss_pred EEEEECCCCCCHHHHHHHHHHHHHCCCCCEEEEEECCCCCHHHHHHHHHHHHHHCCCEEEEECCCCCCHHHHHHHHHHHC Q ss_conf 89997475898889999999998288997489998775780679999999887579889998088885648999999965 Q gi|254780918|r 69 ISVIMPVYKIKKEWLEMAIESVRSQIYSHWELCIAEDCSGDIETVSLLKKYANMDSRIKVVFRAKNGHISAASNSAAQLA 148 (623) Q Consensus 69 iSIiip~yn~~~~~L~~~i~Si~~Qty~~~EliivdD~S~d~~~~~~l~~~~~~d~ri~~~~~~~n~g~~~a~N~~l~~a 148 (623) T Consensus 2 VsviIPayNE~~~il~~~l~s~~~~~--~~eiivV~D~s~d~-~~~~~~~~~~-~~~~~v-~~~~~~GK~~Aln~~l~~a 76 (235) T cd06434 2 VTVIIPVYDEDPDVFRECLRSILRQK--PLEIIVVTDGDDEP-YLSILSQTVK-YGGIFV-ITVPHPGKRRALAEGIRHV 76 (235) T ss_pred EEEEEEECCCCHHHHHHHHHHHHCCC--CCEEEEEECCCCCC-HHHHHHHHCC-CCCEEE-EECCCCCHHHHHHHHHHHC T ss_conf 79999522697689999999998089--99899998899972-8999998634-897899-9889899899999999975 Q ss_pred CCCEEEEECCCCCCCCCHHHHHHHHHHHCCCCCCCCCCCEEECCCCCEEEECCCCC-C---CHH------HHCCCCC-CC Q ss_conf 99899997698752732079999998732475542022206758983654225667-8---966------7414785-43 Q gi|254780918|r 149 TSEWLALLDHDDLLHPTALYYVADAINNNPNAEIIYSDEDKINENQIRSGPYFKYD-F---NPE------LFHVHNM-IT 217 (623) Q Consensus 149 ~Ge~i~~lD~DD~l~p~~L~~~~~~l~~~p~~~~iYsDe~~i~~~g~~~~p~fkp~-~---~~~------~l~s~ny-i~ 217 (623) T Consensus 77 ~~d~v~~~DaD~~~~~~~l~~l~~~f~-d~~vg~V~~~~~~~~~~~~~~~-~~~~~~~~~~~~~~~~~~~~~g~~~~~~G 154 (235) T cd06434 77 TTDIVVLLDSDTVWPPNALPEMLKPFE-DPKVGGVGTNQRILRPRDSKWS-FLAAEYLERRNEEIRAAMSYDGGVPCLSG 154 (235) T ss_pred CCCEEEEECCCCCCCHHHHHHHHHHHC-CCCEEEEEEEEEEECCCCCHHH-HHHHHHHHHHHHHHHHHHHHCCCEEEECC T ss_conf 778899985885358889999999648-9987999703886469998999-99999999999999999985598689637 Q ss_pred HHHHHHHHHHHHHCCCCCC----C-----CCCCCCHHHHHHHHCCCCCCEEECCCCEEEEEECCC Q ss_conf 1457689999971887898----7-----730274136788642487522006842279953388 Q gi|254780918|r 218 HLGVYRTETFKKIGGFREK----F-----EGAQDYDLVLRFLENIDLSQIIHIPRVLYHWRMHDN 273 (623) Q Consensus 218 ~~~~~rr~~~~~iGgf~~~----~-----~~~~D~Dl~lR~~~~~~~~~i~hip~vLy~~R~~~~ 273 (623) T Consensus 155 ~~~~~Rr~~l~~~~~~~~~~~~~~~g~~~~~~ED~~lt~r~~~~G--~r~~y~~~a~v~-~~~p~ 216 (235) T cd06434 155 RTAAYRTEILKDFLFLEEFTNETFMGRRLNAGDDRFLTRYVLSHG--YKTVYQYTSEAY-TETPE 216 (235) T ss_pred HHHHHHHHHHHHHCCHHCCCCCCCCCCCCCCCHHHHHHHHHHHCC--CEEEEECCCEEE-EECCC T ss_conf 079999999985330101230002777776426999999999869--989992477899-97868

HHsearch alignment for GI: 254780918 and conserved domain: cd06434