Protein
Extracellular endo-alpha-(1->5)-L-arabinanase 1
Organism
Bacillus subtilis (strain 168)
Function
Involved in the degradation of arabinan and is a key enzyme in the complete degradation of the plant cell wall. Catalyzes the internal cleavage of alpha-(1->5)-L-arabinofuranosyl residues of linear 1,5-alpha-L-arabinan and of branched sugar beet arabinan. It displays no activity against heavily substituted arabinans or a range of other polysaccharides (larch wood arabinogalactan, wheat arabinoxylan and p-nitrophenyl-alpha-L-arabinofuranoside). The enzyme activity is progressively reduced as alpha-(1->5)-chains become shorter or more highly substituted.
Similarity
Belongs to the glycosyl hydrolase 43 family.
Sequence
MKKKKTWKRFLHFSSAALAAGLIFTSAAPAEAAFWGASNELLHDPTMIKEGSSWYALGTGLTEERGLRVLKSSDAKNWTVQKSIFTTPLSWWSNYVPNYGQNQWAPDIQYYNGKYWLYYSVSSFGSNTSAIGLASSTSISSGGWKDEGLVIRSTSSNNYNAIDPELTFDKDGNPWLAFGSFWSGIKLTKLDKSTMKPTGSLYSIAARPNNGGALEAPTLTYQNGYYYLMVSFDKCCDGVNSTYKIAYGRSKSITGPYLDKSGKSMLEGGGTILDSGNDQWKGPGGQDIVNGNILVRHAYDANDNGIPKLLINDLNWSSGWPSY