PGXB_ASPNG
ID PGXB_ASPNG Reviewed; 438 AA.
AC Q27UB1;
DT 20-APR-2010, integrated into UniProtKB/Swiss-Prot.
DT 04-APR-2006, sequence version 1.
DT 03-AUG-2022, entry version 68.
DE RecName: Full=Exopolygalacturonase B;
DE EC=3.2.1.67;
DE AltName: Full=Galacturan 1,4-alpha-galacturonidase B;
DE AltName: Full=Poly(1,4-alpha-D-galacturonide)galacturonohydrolase B;
DE Flags: Precursor;
GN Name=pgxB;
OS Aspergillus niger.
OC Eukaryota; Fungi; Dikarya; Ascomycota; Pezizomycotina; Eurotiomycetes;
OC Eurotiomycetidae; Eurotiales; Aspergillaceae; Aspergillus;
OC Aspergillus subgen. Circumdati.
OX NCBI_TaxID=5061;
RN [1]
RP NUCLEOTIDE SEQUENCE [GENOMIC DNA], AND FUNCTION.
RC STRAIN=CBS 513.88;
RX PubMed=16822232; DOI=10.1042/bj20060703;
RA Martens-Uzunova E.S., Zandleven J.S., Benen J.A., Awad H., Kools H.J.,
RA Beldman G., Voragen A.G., Van den Berg J.A., Schaap P.J.;
RT "A new group of exo-acting family 28 glycoside hydrolases of Aspergillus
RT niger that are involved in pectin degradation.";
RL Biochem. J. 400:43-52(2006).
CC -!- FUNCTION: Specific in hydrolyzing the terminal glycosidic bond of
CC polygalacturonic acid and oligogalacturonates.
CC {ECO:0000269|PubMed:16822232}.
CC -!- CATALYTIC ACTIVITY:
CC Reaction=[(1->4)-alpha-D-galacturonosyl](n) + H2O = [(1->4)-alpha-D-
CC galacturonosyl](n-1) + alpha-D-galacturonate; Xref=Rhea:RHEA:14117,
CC Rhea:RHEA-COMP:14570, Rhea:RHEA-COMP:14572, ChEBI:CHEBI:15377,
CC ChEBI:CHEBI:58658, ChEBI:CHEBI:140523; EC=3.2.1.67;
CC -!- SUBCELLULAR LOCATION: Secreted {ECO:0000250}.
CC -!- SIMILARITY: Belongs to the glycosyl hydrolase 28 family. {ECO:0000305}.
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DR EMBL; DQ374424; ABD61564.1; -; Genomic_DNA.
DR AlphaFoldDB; Q27UB1; -.
DR SMR; Q27UB1; -.
DR STRING; 5061.CADANGAP00003593; -.
DR CLAE; PGX28B_ASPNG; -.
DR VEuPathDB; FungiDB:An03g06740; -.
DR VEuPathDB; FungiDB:ASPNIDRAFT2_1186687; -.
DR VEuPathDB; FungiDB:ATCC64974_76140; -.
DR VEuPathDB; FungiDB:M747DRAFT_368542; -.
DR eggNOG; ENOG502QPPR; Eukaryota.
DR BioCyc; MetaCyc:MON-20555; -.
DR GO; GO:0005576; C:extracellular region; IEA:UniProtKB-SubCell.
DR GO; GO:0047911; F:galacturan 1,4-alpha-galacturonidase activity; IEA:UniProtKB-EC.
DR GO; GO:0004650; F:polygalacturonase activity; IEA:InterPro.
DR GO; GO:0005975; P:carbohydrate metabolic process; IEA:InterPro.
DR GO; GO:0071555; P:cell wall organization; IEA:UniProtKB-KW.
DR Gene3D; 2.160.20.10; -; 1.
DR InterPro; IPR000743; Glyco_hydro_28.
DR InterPro; IPR012334; Pectin_lyas_fold.
DR InterPro; IPR011050; Pectin_lyase_fold/virulence.
DR Pfam; PF00295; Glyco_hydro_28; 1.
DR SUPFAM; SSF51126; SSF51126; 1.
PE 3: Inferred from homology;
KW Cell wall biogenesis/degradation; Disulfide bond; Glycoprotein;
KW Glycosidase; Hydrolase; Repeat; Secreted; Signal.
FT SIGNAL 1..15
FT /evidence="ECO:0000255"
FT CHAIN 16..438
FT /note="Exopolygalacturonase B"
FT /id="PRO_0000393678"
FT REPEAT 209..248
FT /note="PbH1 1"
FT REPEAT 295..316
FT /note="PbH1 2"
FT REPEAT 327..348
FT /note="PbH1 3"
FT REPEAT 398..430
FT /note="PbH1 4"
FT ACT_SITE 255
FT /note="Proton donor"
FT /evidence="ECO:0000250"
FT ACT_SITE 278
FT /evidence="ECO:0000250"
FT CARBOHYD 118
FT /note="N-linked (GlcNAc...) asparagine"
FT /evidence="ECO:0000255"
FT CARBOHYD 185
FT /note="N-linked (GlcNAc...) asparagine"
FT /evidence="ECO:0000255"
FT CARBOHYD 225
FT /note="N-linked (GlcNAc...) asparagine"
FT /evidence="ECO:0000255"
FT CARBOHYD 263
FT /note="N-linked (GlcNAc...) asparagine"
FT /evidence="ECO:0000255"
FT CARBOHYD 275
FT /note="N-linked (GlcNAc...) asparagine"
FT /evidence="ECO:0000255"
FT CARBOHYD 302
FT /note="N-linked (GlcNAc...) asparagine"
FT /evidence="ECO:0000255"
FT CARBOHYD 329
FT /note="N-linked (GlcNAc...) asparagine"
FT /evidence="ECO:0000255"
FT CARBOHYD 354
FT /note="N-linked (GlcNAc...) asparagine"
FT /evidence="ECO:0000255"
FT CARBOHYD 366
FT /note="N-linked (GlcNAc...) asparagine"
FT /evidence="ECO:0000255"
FT CARBOHYD 400
FT /note="N-linked (GlcNAc...) asparagine"
FT /evidence="ECO:0000255"
FT CARBOHYD 407
FT /note="N-linked (GlcNAc...) asparagine"
FT /evidence="ECO:0000255"
FT DISULFID 257..274
FT /evidence="ECO:0000250"
FT DISULFID 392..398
FT /evidence="ECO:0000250"
SQ SEQUENCE 438 AA; 48383 MW; C1BB7FECF39374D3 CRC64;
MYLLPLTLFL TAAFGVSIPR SPLIPGAQIV PASSTADLRA IGAQHHKYPD RETVTIRASR
NALDDVSSDF LWGLKQANHG GRLLLKQGET YVIGKKLDLT FLDNIEVQLE GEIQFTNNIT
YWQANNFYYD FQKSITFWRW GGQDIKIFGS GVLNGNGQKW YDEFAGKQIL VYNTFYRPIL
FLTDNATRIS VEGITQLNSP CWTNFFVRTN DVSFDNVYIH AFSTNASSDP ANTDGMDSLD
VDGVSFTNMR IDVGDDCFSP KPNTTNIFVQ NMWCNNTHGV SMGSIGQYAG EMDIIENVYI
ENVTLLNGQN GARLKAWAGQ DVGYGRINNV TYKNIQIQNT DAPIVLDQCY FDINATECAK
YPSAVNITNI LFENIWGSSS GKDGKIVADL VCSPDAVCTN ITLSNVNLTS PKGTAEIVCD
DIQGGIGVDC VSDESVTR
