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Protein

1,4-beta-D-glucan cellobiohydrolase A

Gene

cbhA

Organism
Aspergillus niger
Status
Reviewed-Annotation score: Annotation score: 3 out of 5-Experimental evidence at transcript leveli

Functioni

The biological conversion of cellulose to glucose generally requires three types of hydrolytic enzymes: (1) Endoglucanases which cut internal beta-1,4-glucosidic bonds; (2) Exocellobiohydrolases that cut the dissaccharide cellobiose from the non-reducing end of the cellulose polymer chain; (3) Beta-1,4-glucosidases which hydrolyze the cellobiose and other short cello-oligosaccharides to glucose.1 Publication

Catalytic activityi

Hydrolysis of (1->4)-beta-D-glucosidic linkages in cellulose and cellotetraose, releasing cellobiose from the non-reducing ends of the chains.

Sites

Feature keyPosition(s)LengthDescriptionGraphical viewFeature identifierActions
Active sitei227 – 2271NucleophileBy similarity
Active sitei232 – 2321Proton donorBy similarity

GO - Molecular functioni

  1. cellulose 1,4-beta-cellobiosidase activity Source: UniProtKB-EC

GO - Biological processi

  1. cellulose catabolic process Source: UniProtKB-KW
Complete GO annotation...

Keywords - Molecular functioni

Glycosidase, Hydrolase

Keywords - Biological processi

Carbohydrate metabolism, Cellulose degradation, Polysaccharide degradation

Protein family/group databases

CAZyiGH7. Glycoside Hydrolase Family 7.
mycoCLAPiCBH7A_ASPNG.

Names & Taxonomyi

Protein namesi
Recommended name:
1,4-beta-D-glucan cellobiohydrolase A (EC:3.2.1.91)
Alternative name(s):
Beta-glucancellobiohydrolase A
Cellobiohydrolase D
Exocellobiohydrolase A
Exoglucanase A
Gene namesi
Name:cbhA
Synonyms:celD
OrganismiAspergillus niger
Taxonomic identifieri5061 [NCBI]
Taxonomic lineageiEukaryotaFungiDikaryaAscomycotaPezizomycotinaEurotiomycetesEurotiomycetidaeEurotialesAspergillaceaeAspergillus

Subcellular locationi

Secreted Curated

GO - Cellular componenti

  1. extracellular region Source: UniProtKB-SubCell
Complete GO annotation...

Keywords - Cellular componenti

Secreted

PTM / Processingi

Molecule processing

Feature keyPosition(s)LengthDescriptionGraphical viewFeature identifierActions
Signal peptidei1 – 1717Sequence AnalysisAdd
BLAST
Chaini18 – 4524351,4-beta-D-glucan cellobiohydrolase APRO_5000056394Add
BLAST

Amino acid modifications

Feature keyPosition(s)LengthDescriptionGraphical viewFeature identifierActions
Glycosylationi62 – 621N-linked (GlcNAc...)Sequence Analysis
Glycosylationi285 – 2851N-linked (GlcNAc...)Sequence Analysis
Glycosylationi335 – 3351N-linked (GlcNAc...)Sequence Analysis
Glycosylationi402 – 4021N-linked (GlcNAc...)Sequence Analysis
Glycosylationi445 – 4451N-linked (GlcNAc...)Sequence Analysis

Keywords - PTMi

Glycoprotein

Expressioni

Inductioni

Expression is under the control of the xylanolytic transcriptional activator xlnR.2 Publications

Structurei

3D structure databases

ProteinModelPortaliQ9UVS9.
SMRiQ9UVS9. Positions 18-449.
ModBaseiSearch...
MobiDBiSearch...

Family & Domainsi

Sequence similaritiesi

Keywords - Domaini

Signal

Phylogenomic databases

eggNOGiNOG85664.

Family and domain databases

Gene3Di2.70.100.10. 1 hit.
InterProiIPR013320. ConA-like_dom.
IPR001722. Glyco_hydro_7.
[Graphical view]
PfamiPF00840. Glyco_hydro_7. 1 hit.
[Graphical view]
PRINTSiPR00734. GLHYDRLASE7.
SUPFAMiSSF49899. SSF49899. 1 hit.

Sequencei

Sequence statusi: Complete.

Sequence processingi: The displayed sequence is further processed into a mature form.

Q9UVS9-1 [UniParc]FASTAAdd to basket

« Hide

        10         20         30         40         50
MHQRALLFSA LLTAVRAQQA GTLTEEVHPS LTWQKCTSEG SCTEQSGSVV
60 70 80 90 100
IDSNWRWTHS VNDSTNCYTG NTWDATLCPD DETCAANCAL DGADYESTYG
110 120 130 140 150
VTTDGDSLTL KFVTGSNVGS RLYLMDTSDE GYQTFNLLDA EFTFDVDVSN
160 170 180 190 200
LPCGLNGALY FTAMDADGGV SKYPANKAGA KYGTGYCDSQ CPRDLKFIDG
210 220 230 240 250
QANVDGWEPS SNNDNTGIGN HGSCCPEMDI WEANKISTAL TPHPCDSSEQ
260 270 280 290 300
TMCEGNDCGG TYSDDRYGGT CDPDGCDFNP YRMGNDSFYG PGKTIDTGSK
310 320 330 340 350
MTVVTQFITD GSGSLSEIKR YYVQNGNVIA NADSNISGVT GNSITTDFCT
360 370 380 390 400
AQKKAFGDED IFAEHNGLAG ISDAMSSMVL ILSLWDDYYA SMEWLDSDYP
410 420 430 440 450
ENATATDPGV ARGTCDSESG VPATVEGAHP DSSVTFSNIK FGPINSTFSA

SA
Length:452
Mass (Da):48,258
Last modified:May 1, 2000 - v1
Checksum:i6364A0F4BF7D254F
GO

Experimental Info

Feature keyPosition(s)LengthDescriptionGraphical viewFeature identifierActions
Sequence conflicti101 – 1011V → I in ACT65727 (Ref. 2) Curated
Sequence conflicti170 – 1701V → A in ACT65727 (Ref. 2) Curated
Sequence conflicti359 – 3591E → D in ACT65727 (Ref. 2) Curated

Sequence databases

Select the link destinations:
EMBLi
GenBanki
DDBJi
Links Updated
AF156268 Genomic DNA. Translation: AAF04491.1.
GQ281319 Genomic DNA. Translation: ACT65727.1.

Cross-referencesi

Sequence databases

Select the link destinations:
EMBLi
GenBanki
DDBJi
Links Updated
AF156268 Genomic DNA. Translation: AAF04491.1.
GQ281319 Genomic DNA. Translation: ACT65727.1.

3D structure databases

ProteinModelPortaliQ9UVS9.
SMRiQ9UVS9. Positions 18-449.
ModBaseiSearch...
MobiDBiSearch...

Protein family/group databases

CAZyiGH7. Glycoside Hydrolase Family 7.
mycoCLAPiCBH7A_ASPNG.

Protocols and materials databases

Structural Biology KnowledgebaseSearch...

Phylogenomic databases

eggNOGiNOG85664.

Family and domain databases

Gene3Di2.70.100.10. 1 hit.
InterProiIPR013320. ConA-like_dom.
IPR001722. Glyco_hydro_7.
[Graphical view]
PfamiPF00840. Glyco_hydro_7. 1 hit.
[Graphical view]
PRINTSiPR00734. GLHYDRLASE7.
SUPFAMiSSF49899. SSF49899. 1 hit.
ProtoNetiSearch...

Publicationsi

  1. "Two cellobiohydrolase-encoding genes from Aspergillus niger require D-xylose and the xylanolytic transcriptional activator XlnR for their expression."
    Gielkens M.M., Dekkers E., Visser J., de Graaff L.H.
    Appl. Environ. Microbiol. 65:4340-4345(1999) [PubMed] [Europe PMC] [Abstract]
    Cited for: NUCLEOTIDE SEQUENCE [GENOMIC DNA], INDUCTION.
    Strain: ATCC 9029 / NRRL 3 / CBS 120.49 / DSM 2466 / N400.
  2. Hsing-Ren W., Trong-Rong Y.
    Submitted (JUN-2009) to the EMBL/GenBank/DDBJ databases
    Cited for: NUCLEOTIDE SEQUENCE [GENOMIC DNA].
    Strain: BCRC 31494.
  3. "Induction, production, repression, and de-repression of exoglucanase synthesis in Aspergillus niger."
    Hanif A., Yasmeen A., Rajoka M.I.
    Bioresour. Technol. 94:311-319(2004) [PubMed] [Europe PMC] [Abstract]
    Cited for: FUNCTION, INDUCTION.

Entry informationi

Entry nameiCBHA_ASPNG
AccessioniPrimary (citable) accession number: Q9UVS9
Secondary accession number(s): C7ENW1
Entry historyi
Integrated into UniProtKB/Swiss-Prot: April 20, 2010
Last sequence update: May 1, 2000
Last modified: January 7, 2015
This is version 57 of the entry and version 1 of the sequence. [Complete history]
Entry statusiReviewed (UniProtKB/Swiss-Prot)
Annotation programFungal Protein Annotation Program

Miscellaneousi

Documents

  1. Glycosyl hydrolases
    Classification of glycosyl hydrolase families and list of entries
  2. SIMILARITY comments
    Index of protein domains and families

External Data

Dasty 3

Similar proteinsi

Links to similar proteins from the UniProt Reference Clusters (UniRef) at 100%, 90% and 50% sequence identity:
100%UniRef100 combines identical sequences and sub-fragments with 11 or more residues from any organism into Uniref entry.
90%UniRef90 is built by clustering UniRef100 sequences that have at least 90% sequence identity to, and 80% overlap with, the longest sequence (a.k.a seed sequence).
50%UniRef50 is built by clustering UniRef90 seed sequences that have at least 50% sequence identity to, and 80% overlap with, the longest sequence in the cluster.