AMYB_ASPAW
ID AMYB_ASPAW Reviewed; 499 AA.
AC Q02906;
DT 01-OCT-1996, integrated into UniProtKB/Swiss-Prot.
DT 01-OCT-1996, sequence version 1.
DT 03-AUG-2022, entry version 100.
DE RecName: Full=Alpha-amylase B;
DE EC=3.2.1.1;
DE AltName: Full=1,4-alpha-D-glucan glucanohydrolase B;
DE Flags: Precursor;
GN Name=amyB;
OS Aspergillus awamori (Black koji mold).
OC Eukaryota; Fungi; Dikarya; Ascomycota; Pezizomycotina; Eurotiomycetes;
OC Eurotiomycetidae; Eurotiales; Aspergillaceae; Aspergillus.
OX NCBI_TaxID=105351;
RN [1]
RP NUCLEOTIDE SEQUENCE [GENOMIC DNA].
RC STRAIN=UVK143F;
RX PubMed=2340591; DOI=10.1007/bf00312611;
RA Korman D.R., Bayliss F.T., Barnett C.C., Carmona C.L., Kodama K.H.,
RA Royer T.J., Thompson S.A., Ward M., Wilson L.J., Berka R.M.;
RT "Cloning, characterization, and expression of two alpha-amylase genes from
RT Aspergillus niger var. awamori.";
RL Curr. Genet. 17:203-212(1990).
CC -!- CATALYTIC ACTIVITY:
CC Reaction=Endohydrolysis of (1->4)-alpha-D-glucosidic linkages in
CC polysaccharides containing three or more (1->4)-alpha-linked D-
CC glucose units.; EC=3.2.1.1;
CC -!- COFACTOR:
CC Name=Ca(2+); Xref=ChEBI:CHEBI:29108;
CC Evidence={ECO:0000250|UniProtKB:P0C1B3};
CC Note=Binds 2 calcium ions per subunit. Calcium is inhibitory at high
CC concentrations. {ECO:0000250|UniProtKB:P0C1B3};
CC -!- SIMILARITY: Belongs to the glycosyl hydrolase 13 family. {ECO:0000305}.
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DR EMBL; X52756; CAA36967.1; -; Genomic_DNA.
DR PIR; B48305; B48305.
DR AlphaFoldDB; Q02906; -.
DR SMR; Q02906; -.
DR CAZy; GH13; Glycoside Hydrolase Family 13.
DR GO; GO:0110165; C:cellular anatomical entity; IEA:UniProt.
DR GO; GO:0004556; F:alpha-amylase activity; IEA:UniProtKB-EC.
DR GO; GO:0005509; F:calcium ion binding; IEA:InterPro.
DR GO; GO:0016052; P:carbohydrate catabolic process; IEA:InterPro.
DR Gene3D; 2.60.40.1180; -; 1.
DR InterPro; IPR013777; A-amylase-like.
DR InterPro; IPR015340; A_amylase_C_dom.
DR InterPro; IPR006046; Alpha_amylase.
DR InterPro; IPR006047; Glyco_hydro_13_cat_dom.
DR InterPro; IPR013780; Glyco_hydro_b.
DR InterPro; IPR017853; Glycoside_hydrolase_SF.
DR Pfam; PF00128; Alpha-amylase; 1.
DR Pfam; PF09260; DUF1966; 1.
DR PIRSF; PIRSF001024; Alph-amyl_fung; 1.
DR PRINTS; PR00110; ALPHAAMYLASE.
DR SMART; SM00642; Aamy; 1.
DR SUPFAM; SSF51445; SSF51445; 1.
PE 3: Inferred from homology;
KW Calcium; Carbohydrate metabolism; Disulfide bond; Glycoprotein;
KW Glycosidase; Hydrolase; Metal-binding; Signal.
FT SIGNAL 1..21
FT /evidence="ECO:0000255"
FT CHAIN 22..499
FT /note="Alpha-amylase B"
FT /id="PRO_0000001348"
FT ACT_SITE 227
FT /note="Nucleophile"
FT /evidence="ECO:0000250|UniProtKB:P56271"
FT ACT_SITE 251
FT /note="Proton donor"
FT /evidence="ECO:0000250|UniProtKB:P56271"
FT BINDING 56
FT /ligand="substrate"
FT /evidence="ECO:0000250|UniProtKB:P0C1B3"
FT BINDING 104
FT /ligand="substrate"
FT /evidence="ECO:0000250|UniProtKB:P0C1B3"
FT BINDING 142
FT /ligand="Ca(2+)"
FT /ligand_id="ChEBI:CHEBI:29108"
FT /ligand_label="1"
FT /evidence="ECO:0000250|UniProtKB:P0C1B3"
FT BINDING 143
FT /ligand="substrate"
FT /evidence="ECO:0000250|UniProtKB:P0C1B3"
FT BINDING 183
FT /ligand="Ca(2+)"
FT /ligand_id="ChEBI:CHEBI:29108"
FT /ligand_label="1"
FT /evidence="ECO:0000250|UniProtKB:P56271"
FT BINDING 196
FT /ligand="Ca(2+)"
FT /ligand_id="ChEBI:CHEBI:29108"
FT /ligand_label="1"
FT /evidence="ECO:0000250|UniProtKB:P56271"
FT BINDING 225
FT /ligand="substrate"
FT /evidence="ECO:0000250|UniProtKB:P0C1B3"
FT BINDING 227
FT /ligand="Ca(2+)"
FT /ligand_id="ChEBI:CHEBI:29108"
FT /ligand_label="2"
FT /evidence="ECO:0000250|UniProtKB:P0C1B3"
FT BINDING 230..231
FT /ligand="substrate"
FT /evidence="ECO:0000250|UniProtKB:P0C1B3"
FT BINDING 231
FT /ligand="Ca(2+)"
FT /ligand_id="ChEBI:CHEBI:29108"
FT /ligand_label="1"
FT /evidence="ECO:0000250|UniProtKB:P0C1B3"
FT BINDING 251
FT /ligand="Ca(2+)"
FT /ligand_id="ChEBI:CHEBI:29108"
FT /ligand_label="2"
FT /evidence="ECO:0000250|UniProtKB:P0C1B3"
FT BINDING 255
FT /ligand="substrate"
FT /evidence="ECO:0000250|UniProtKB:P0C1B3"
FT BINDING 318
FT /ligand="substrate"
FT /evidence="ECO:0000250|UniProtKB:P0C1B3"
FT BINDING 365
FT /ligand="substrate"
FT /evidence="ECO:0000250|UniProtKB:P0C1B3"
FT SITE 318
FT /note="Transition state stabilizer"
FT /evidence="ECO:0000250|UniProtKB:P0C1B3"
FT CARBOHYD 218
FT /note="N-linked (GlcNAc...) asparagine"
FT /evidence="ECO:0000255"
FT DISULFID 51..59
FT /evidence="ECO:0000250|UniProtKB:P56271"
FT DISULFID 171..185
FT /evidence="ECO:0000250|UniProtKB:P56271"
FT DISULFID 261..304
FT /evidence="ECO:0000250|UniProtKB:P56271"
FT DISULFID 461..496
FT /evidence="ECO:0000250|UniProtKB:P56271"
SQ SEQUENCE 499 AA; 54921 MW; 740B96B11BC01A8A CRC64;
MMVAWWSLFL YGLQVAAPAL AATPADWRSQ SIYFLLTDRF ARTDGSTTAT CNTADQKYCG
GTWQGIIDKL DYIQGMGFTA IWITPVTAQL PQTTAYGDAY HGYWQQDIYS LNENYGTADD
LKALSSALHE RGMYLMVDVV ANHMGYDGAG SSVDYSVFKP FSSQDYFHPF CFIQNYEDQT
QVEDCWLGDN TVSLPDLDTT KDVVKNEWYD WVGSLVSNYS IDGLRIDTVK HVQKDFWPGY
NKAAGVYCIG EVLDGDPAYT CPYQNVMDGV LNYPIYYPLL NAFKSTSGSM DDLYNMINTV
KSDCPDSTLL GTFVENHDNP RFASYTNDIA LAKNVAAFII LNDGIPIIYA GQEQHYAGGN
DPANREATWL SGYPTDSELY KLIASRNAIR NYAISKDTGF VTYKNWPIYK DDTTIPMRKG
TDGSQIVTIL SNKGASGDSY TLSLSGAGYT AGQQLTEVIG CTTVTVGSDG NVPVPMAGGL
PRVLYPTEKL AGSKICSSS
