AC MF_02124; DC Protein; auto TR HAMAP; MF_02124; -; 1; level=0 XX Names: GlgE XX ID GLGE DE RecName: Full=Alpha-1,4-glucan:maltose-1-phosphate maltosyltransferase; DE Short=GMPMT; DE EC=2.4.99.16; DE AltName: Full=(1->4)-alpha-D-glucan:maltose-1-phosphate alpha-D-maltosyltransferase; GN Name=glgE; XX CC -!- FUNCTION: Maltosyltransferase that uses maltose 1-phosphate (M1P) as CC the sugar donor to elongate linear or branched alpha-(1->4)-glucans. Is CC involved in a branched alpha-glucan biosynthetic pathway from CC trehalose, together with TreS, Mak and GlgB. CC -!- CATALYTIC ACTIVITY: CC Reaction=[(1->4)-alpha-D-glucosyl](n) + alpha-maltose 1-phosphate = CC [(1->4)-alpha-D-glucosyl](n+2) + phosphate; Xref=Rhea:RHEA:42692, CC Rhea:RHEA-COMP:9584, Rhea:RHEA-COMP:10183, ChEBI:CHEBI:15444, CC ChEBI:CHEBI:43474, ChEBI:CHEBI:63576; EC=2.4.99.16; case CC -!- PATHWAY: Glycan biosynthesis; glycogen biosynthesis. end case CC -!- SUBUNIT: Homodimer. CC -!- SIMILARITY: Belongs to the glycosyl hydrolase 13 family. GlgE CC subfamily. XX DR Pfam; PF00128; Alpha-amylase; 1; trigger=no DR Pfam; PF11896; DUF3416; 1; trigger=no XX KW Carbohydrate metabolism KW Glycosyltransferase KW Transferase case KW Glycogen biosynthesis KW Glycogen metabolism end case XX GO GO:0016758; F:hexosyltransferase activity GO GO:0030979; P:alpha-glucan biosynthetic process case GO GO:0005978; P:glycogen biosynthetic process end case XX FT From: GLGE1_STRCO (Q9L1K2) FT BINDING 534..535 FT /ligand="alpha-maltose 1-phosphate" FT /ligand_id="ChEBI:CHEBI:63576" FT Condition: K-[YF] FT ACT_SITE 394 FT /note="Nucleophile" FT Condition: D FT ACT_SITE 423 FT /note="Proton donor" FT Condition: E FT BINDING 264 FT /ligand="alpha-maltose 1-phosphate" FT /ligand_id="ChEBI:CHEBI:63576" FT Condition: [KR] FT BINDING 324 FT /ligand="alpha-maltose 1-phosphate" FT /ligand_id="ChEBI:CHEBI:63576" FT Condition: Q FT BINDING 359 FT /ligand="alpha-maltose 1-phosphate" FT /ligand_id="ChEBI:CHEBI:63576" FT Condition: D FT BINDING 395 FT /ligand="alpha-maltose 1-phosphate" FT /ligand_id="ChEBI:CHEBI:63576" FT Condition: N FT SITE 480 FT /note="Transition state stabilizer" FT Condition: D XX Size: 630-746; Related: None; Template: P9WQ17; Q9L1K2; Q9RP48; Q9KY04; Scope: Bacteria Archaea Fusion: Nter: None Cter: None Duplicate: in STRCO Plasmid: None Comments: The "GlgE pathway" has been shown to be involved in the conversion of trehalosee to glycogen in M.smegmatis (see PubMed=18505459), but it may be also involved in the biosynthesis of other types of alpha(1->4)-glucans. XX # Revision 1.12 2022/11/19 //