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Protein

Xylosidase/arabinosidase

Gene

xylB

Organism
Butyrivibrio fibrisolvens
Status
Reviewed-Annotation score: -Protein inferred from homologyi

Functioni

Has a 1.6-fold higher activity as an arabinosidase than as a beta-xylosidase when tested on the substrates nitrophenyl-beta-D-xylopyranoside and P-nitrophenyl-alpha-L-arabinofuranoside.

Catalytic activityi

Hydrolysis of (1->4)-beta-D-xylans, to remove successive D-xylose residues from the non-reducing termini.
Hydrolysis of terminal non-reducing alpha-L-arabinofuranoside residues in alpha-L-arabinosides.

Sites

Feature keyPosition(s)DescriptionActionsGraphical viewLength
Active sitei15Proton acceptorBy similarity1
Sitei123Important for catalytic activity, responsible for pKa modulation of the active site Glu and correct orientation of both the proton donor and substrateBy similarity1
Active sitei185Proton donorBy similarity1

GO - Molecular functioni

GO - Biological processi

Keywordsi

Molecular functionGlycosidase, Hydrolase, Multifunctional enzyme
Biological processCarbohydrate metabolism, Polysaccharide degradation, Xylan degradation

Protein family/group databases

CAZyiGH43 Glycoside Hydrolase Family 43

Names & Taxonomyi

Protein namesi
Recommended name:
Xylosidase/arabinosidase
Including the following 2 domains:
Beta-xylosidase (EC:3.2.1.37)
Alternative name(s):
1,4-beta-D-xylan xylohydrolase
Xylan 1,4-beta-xylosidase
Alpha-L-arabinofuranosidase (EC:3.2.1.55)
Short name:
Arabinosidase
Gene namesi
Name:xylB
OrganismiButyrivibrio fibrisolvens
Taxonomic identifieri831 [NCBI]
Taxonomic lineageiBacteriaFirmicutesClostridiaClostridialesLachnospiraceaeButyrivibrio

PTM / Processingi

Molecule processing

Feature keyPosition(s)DescriptionActionsGraphical viewLength
ChainiPRO_00000576941 – 517Xylosidase/arabinosidaseAdd BLAST517

Proteomic databases

PRIDEiP45982

Structurei

3D structure databases

ProteinModelPortaliP45982
SMRiP45982
ModBaseiSearch...
MobiDBiSearch...

Family & Domainsi

Sequence similaritiesi

Belongs to the glycosyl hydrolase 43 family.Curated

Family and domain databases

Gene3Di2.115.10.20, 1 hit
InterProiView protein in InterPro
IPR013320 ConA-like_dom_sf
IPR006710 Glyco_hydro_43
IPR023296 Glyco_hydro_beta-prop_sf
PfamiView protein in Pfam
PF04616 Glyco_hydro_43, 1 hit
SUPFAMiSSF49899 SSF49899, 1 hit
SSF75005 SSF75005, 1 hit

Sequencei

Sequence statusi: Complete.

P45982-1 [UniParc]FASTAAdd to basket

« Hide

        10         20         30         40         50
MVIANNPILK GFYPDPSICR KGDDFYLVCS SFVYAPGVPI FHTKDLAHFE
60 70 80 90 100
QIGNILDRES QLPLSGDISR GIFAPTIREH NGIFYMITTN VSSGGNFIVT
110 120 130 140 150
AKDPAGPWSE PYYLGEDEAP GIDPSLFFDD DGKCYYVGTR PNPDGVRYNG
160 170 180 190 200
DWEIWVQELD LEQMKLVGPS MAIWKGALKD VIWPEGPHLY KKDGYYYLLH
210 220 230 240 250
AEAGTSFEHA ISVARSKELF KWFEGCPRNP IFTHRNLGKD YPVCNVGHAD
260 270 280 290 300
LVDDINGNWY MVMLASRPCK GKCSLGRETF LAKVIWEDGW PVVNPGVGRL
310 320 330 340 350
TDEVEMDLPE YRFSKEITTK DKMTFEETVL DDRFVGIERR SEDFYSLTDN
360 370 380 390 400
PGFLRLKLRP EAIENTGNPS YLGIRQKTHS FRASCGLKFT PAKDNECAGM
410 420 430 440 450
VLFQNNENHL ELLVVKKKDK LQFKVGPVIK GTKIRLATFD ISSGDLEIIL
460 470 480 490 500
EAANQLANIY IKKNNEKILV AECIDLSPYT TEESGGFVGC TIGLYASSNG
510
KTSDNYCDYS YFTVEEV
Length:517
Mass (Da):58,222
Last modified:November 1, 1995 - v1
Checksum:iF1B645F76F6FE0B5
GO

Sequence databases

Select the link destinations:
EMBLi
GenBanki
DDBJi
Links Updated
M55537 Genomic DNA Translation: AAA63610.1
PIRiA49776

Similar proteinsi

Entry informationi

Entry nameiXYLB_BUTFI
AccessioniPrimary (citable) accession number: P45982
Entry historyiIntegrated into UniProtKB/Swiss-Prot: November 1, 1995
Last sequence update: November 1, 1995
Last modified: May 23, 2018
This is version 67 of the entry and version 1 of the sequence. See complete history.
Entry statusiReviewed (UniProtKB/Swiss-Prot)
Annotation programProkaryotic Protein Annotation Program
UniProt is an ELIXIR core data resource
Main funding by: National Institutes of Health