Protein
Intracellular exo-alpha-(1->5)-L-arabinofuranosidase
Organism
Clostridium thermocellum (strain ATCC 27405 / DSM 1237 / NBRC 103400 / NCIMB 10682 / NRRL B-4536 / VPI 7372)
Function
Involved in the degradation of arabinan and is a key enzyme in the complete degradation of the plant cell wall. Catalyzes the cleavage of terminal alpha-(1->5)-arabinofuranosyl bonds in small oligosaccharides as alpha-(1->5)-linked arabinobiose/arabinotriose, but does not display significant activity against linear non-substituted arabinan. It is also highly efficient in the cleavage of alpha-(1->3)-linked arabinoside of xylobiose and of the alpha-(1->3)-linked arabinoside decorations of polymeric wheat arabinoxylan. It exhibits very low activity against sugar beet arabinan.
Similarity
Belongs to the glycosyl hydrolase 51 family.
Sequence
MKKARMTVDKDYKIAEIDKRIYGSFVEHLGRAVYDGLYQPGNSKSDEDGFRKDVIELVKELNVPIIRYPGGNFVSNYFWEDGVGPVEDRPRRLDLAWKSIEPNQVGINEFAKWCKKVNAEIMMAVNLGTRGISDACNLLEYCNHPGGSKYSDMRIKHGVKEPHNIKVWCLGNEMDGPWQVGHKTMDEYGRIAEETARAMKMIDPSIELVACGSSSKDMPTFPQWEATVLDYAYDYVDYISLHQYYGNKENDTADFLAKSDDLDDFIRSVIATCDYIKAKKRSKKDIYLSFDEWNVWYHSNNEDANIMQNEPWRIAPPLLEDIYTFEDALLVGLMLITLMKHADRIKIACLAQLINVIAPIVTERNGGAAWRQTIFYPFMHASKYGRGIVLQPVINSPLHDTSKHEDVTDIESVAIYNEEKEEVTIFAVNRNIHEDIVLVSDVRGMKDYRLLEHIVLEHQDLKIRNSVNGEEVYPKNSDKSSFDDGILTSMLRRASWNVIRIGK