SS2

Sucrose synthase 2

816 amino acids

Sucrose-cleaving enzyme that provides UDP-glucose and fructose for various metabolic pathways.

Belongs to the glycosyltransferase 1 family. Plant sucrose synthase subfamily.

92.575 kDa

MGETAGERALSRVHSVRERIGHSLSAHTNELVAVFSRLVNQGKGMLQPHQITAEYNAAIPEAEREKLKNTPFEDLLRGAQEAIVIPPWVALAIRPRPGVWEYVRVNVSELGVEELSVLRYLQFKEQLANGSTDNNFVLELDFGPFNASFPRPSLSKSIGNGVQFLNRHLSSKLFHDKESMYPLLNFLRAHNYKGMTMMLNDRIRSLGTLQGALRKAETHLSGLPADTPYTEFHHRFQELGLEKGWGDCAQRASETIHLLLDLLEAPDPSSLEKFLGTIPMVLNVVILSPHGYFAQANVLGYPDTGGQVVYILDQVRAMENEMLLRIKQQGLDITPKILIVTRMLPDAHGTTCGQRLEKVLGTEHTHILRVPFKTEDGIVRKWISRFEVWPYLEAYTDDVAHEIAGELQANPDLIIGNYSDGNLVACLLAHKLGVTHCTIAHALEKTKYPNSDLYWKKFEDHYHFSCQFTADLIAMNHADFIITSTFQEIAGNKDTVGQYESHMAFTMPGLYRVVHGIDVFDPKFNIVSPGADMSIYFPYTEQQKRLTSLHTEIEELLFSDVENAEHKFVLKDKKKPIIFSMARLDRVKNMTGLVEMYGRNPRLQELVNLVVVCGDHGKVSKDKEEQVEFKKMFDLIEKYNLSGHIRWISAQMNRVRNGELYRYICDMKGAFVQPAFYEAFGLTVIEAMTCGLPTFATAYGGPAEIIVNGVSGYHIDPYQNDKASALLVGFFGKCQEDPSHWNKISQGGLQRIEEKYTWKLYSERLMTLSGVYGFWKYVSNLDRRETRRYLEMLYALKYRKMAATVPLAVEGETSGE

ss2

Sucrose synthase

794 amino acids

Catalyzes the reversible conversion of sucrose and a nucleotide disphosphate (NDP) into fructose and NDP-glucose; although the reaction is freely reversible in vitro, the physiological reaction seems to be sucrose cleavage. Unlike characterized plant enzymes prefers ADP as a cosubstrate, whereas plants prefer UDP (PubMed:25846332, PubMed:26013491). The KM for sucrose is 8-fold lower in the presence of ADP than UDP (PubMed:25846332). Its preference for ADP over UDP suggests it may directly link sucrose and glycogen metabolism (Probable).

Belongs to the glycosyltransferase 1 family.

90.865 kDa

MTTIDTLATCTQQNRDAVYTLLRRYFTANRTLLLQSDLREGLLQTEQDCGQSDMLRAFVFRLQEGIFSSPWAYLALRPEIAKWEFMRIHQEHLIPEKLTISEFLKFKETVVKGEATESVLEVDFGPFNRGFPRLKESRSIGQGVIFLNRKLSSEMFSRIEAGHTSLLHFLGVHAIEGQQLMFSNNSHDIHAVRNQLRQALEMLETLDGTTPWIELAPKMNQLGFAPGWGHNANRVAETMNMLMDILEAPSPSALEEFLACIPMISRLLILSPHGYFGQDNVLGLPDTGGQVVYILDQVRALEKEMHDRLQLQGVQVEPKILIVTRLIPDAGDTTCNQRLEKVSGCTNTWILRVPFRKHNGEIIPHWISRFEIWPHLEIFAGDVEREALAELGGHPDLIIGNYSDGNLVATLLSRRLGVTQCNIAHALEKTKYLHSDIYWQENEDKYHFSCQYTADLLAMNSADFIVTSTYQEIAGTREAEGQYESYQAFSMPDLYRVIHGIDLFDPKFNIVSPGANADIYFPYSDPNRRLHSLIPEIESLIFDDATNLPARGYLQDPDKPLIFTMARLDRIKNITGLVELYAASPRLRSLANLVIVGGKIDPQHSSDHEEQEQIHRMHQLMDEHELDQQVRWLGMRLDKNLAGELYRYIADKRGIFVQPALFEAFGLTIIEAMASGLPTFATRYGGPLEIIQNNRSGFHIDPNQGAATADLIADFFEKNLENPQEWERISQGALDRVASRYTWKLYAERMMTLSRIYGFWKFVSGLEREETDRYLNMFYHLQFRPLANRLAHEI

SS2

Starch synthase 2, chloroplastic/amyloplastic

792 amino acids

Involved in the synthesis of glycan chains within amylopectin in leaves. Is required to produce chains with a degree of polymerization of 12 to 25 (DP12-DP25).

Belongs to the glycosyltransferase 1 family. Bacterial/plant glycogen synthase subfamily.

87.593 kDa

MASVAESSFPLLCQIKTQRRINSSTLRHSRVSYHDLPSGSLSFRSRSFVLGHRCKCVSRVEASGSDDDEPEDALQATIDKSKKVLAMQRNLLHQIAERRKLVSSIKESTPDLDDAKASSKQESASSVNANTDATKKEIMDGDANGSVSPSTYGKSSLSKEPEAKTFSPSTESLKNRKQSSASVISSSPVTSPQKPSDVATNGKPWSSVVASSVDPPYKPSSVMTSPEKTSDPVTSPGKPSKSRAGAFWSDPLPSYLTKAPQTSTMKTEKYVEKTPDVASSETNEPGKDEEKPPPLAGANVMNVILVAAECAPFSKTGGLGDVAGALPKSLARRGHRVMVVVPRYAEYAEAKDLGVRKRYKVAGQDMEVMYFHAFIDGVDFVFIDSPEFRHLSNNIYGGNRLDILKRMVLFCKAAVEVPWYVPCGGVCYGDGNLAFIANDWHTALLPVYLKAYYRDHGIMKYTRSVLVIHNIAHQGRGPVDDFSYVDLPSHYLDSFKLYDPVGGEHFNIFAAGLKAADRVLTVSHGYSWEVKTLEGGWGLHNIINENDWKFRGIVNGIDTQEWNPEFDTYLHSDDYTNYSLENLHIGKPQCKAALQKELGLPVRPDVPLIGFIGRLDHQKGVDLIAEAVPWMMSQDVQLVMLGTGRPDLEEVLRQMEHQYRDKARGWVGFSVKTAHRITAGADILLMPSRFEPCGLNQLYAMNYGTIPVVHAVGGLRDTVQQFDPYSETGLGWTFDSAEAGKLIHALGNCLLTYREYKESWEGLQRRGMTQDLSWDNAAEKYEEVLVAAKYHW

SS2

Granule-bound starch synthase 2, chloroplastic/amyloplastic

767 amino acids

Accounts for only 10 to 15% of the total soluble starch synthase activity in tubers.

Belongs to the glycosyltransferase 1 family. Bacterial/plant glycogen synthase subfamily.

85.222 kDa

MENSILLHSGNQFHPNLPLLALRPKKLSLIHGSSREQMWRIKRVKATGENSGEAASADESNDALQVTIEKSKKVLAMQQDLLQQIAERRKVVSSIKSSLANAKGTYDGGSGSLSDVDIPDVDKDYNVTVPSTAATPITDVDKNTPPAISQDFVESKREIKRDLADERAPPLSRSSITASSQISSTVSSKRTLNVPPETPKSSQETLLDVNSRKSLVDVPGKKIQSYMPSLRKESSASHVEQRNENLEGSSAEANEETEDPVNIDEKPPPLAGTNVMNIILVASECAPWSKTGGLGDVAGALPKALARRGHRVMVVAPRYDNYPEPQDSGVRKIYKVDGQDVEVTYFQAFIDGVDFVFIDSHMFRHIGNNIYGGNRVDILKRMVLFCKAAIEVPWHVPCGGVCYGDGNLVFIANDWHTALLPVYLKAYYRDNGIMNYTRSVLVIHNIAHQGRGPLEDFSYVDLPPHYMDPFKLYDPVGGEHFNIFAAGLKTADRVVTVSHGYSWELKTSQGGWGLHQIINENDWKLQGIVNGIDTKEWNPELDVHLQSDGYMNYSLDTLQTGKPQCKAALQKELGLPVRDDVPLIGFIGRLDPQKGVDLIAEAVPWMMGQDVQLVMLGTGRRDLEQMLRQFECQHNDKIRGWVGFSVKTSHRITAGADILLMPSRFEPCGLNQLYAMKYGTIPVVHAVGGLRDTVQPFDPFNESGLGWTFSRAEASQLIHALGNCLLTYREYKKSWEGIQTRCMTQDLSWDNAAQNYEEVLIAAKYQW

SS2

Squalene synthase 2

415 amino acids

Component of the triterpene saponins (e.g. ginsenosides or panaxosides) and phytosterols biosynthetic pathways (PubMed:29378087). Catalyzes the biosynthesis of squalene (By similarity).

Belongs to the phytoene/squalene synthase family.

47.13 kDa

MGSLGAILKHPDDFYPLLKLKIAARHAEKQIPSEPHWAFCYSMLHKVSRSFGLVIQQLGPQLRDAVCIFYLVLRALDTVEDDTSISTEVKVPILMAFHRHIYDNDWHFSCGTKEYKVLMDEFHHVSNAFLDLGSGYKEAIEDITMRMGAGMAKFICKEVETIDDYDEYCHYVAGLVGLGLSKLFHASGAEDLATDSLSNSMGLFLQKTNIIRDYLEDINEIPKSRMFWPRQIWSKYVDKLEDLKYEENSGKAVQCLNDMVTNALLHVEDCLKYMSDLRDPAIFRFCAIPQIMSIGTLALCYNNIQVFRGVVKMRRGLTAKVIDRTNTMSDVYGAFFDFSCMLKSKVDNNDPNATKTLSRLEAIQKICKNSGALTTKRKSYIIENESGYNSTLIVILFIILAILYAYLSSNLPNSL