AbfA

• Description: alpha-L-arabinofuranosidase
  
  

Gene name	abfA
Synonyms
Essential	no
Product	alpha-L-arabinofuranosidase
Function	arabinan degradation
Metabolic function and regulation of this protein in SubtiPathways: Sugar catabolism
MW, pI	56 kDa, 5.344
Gene length, protein length	1500 bp, 500 aa
Immediate neighbours	cstA, araQ
Get the DNA and protein sequences (Barbe et al., 2009)
Genetic context This image was kindly provided by SubtiList

The gene

Basic information

• Locus tag: BSU28720

Database entries

• DBTBS entry: [1]

• SubtiList entry: [2]

The protein

Basic information/ Evolution

• Catalyzed reaction/ biological activity: Hydrolysis of terminal non-reducing alpha-L-arabinofuranoside residues in alpha-L-arabinosides (according to Swiss-Prot)

• Protein family: glycosyl hydrolase 51 family (according to Swiss-Prot)

• Paralogous protein(s):

Extended information on the protein

• Kinetic information:

• Domains:

• Modification:

• Cofactor(s):

• Effectors of protein activity:

• Interactions:

• Localization: cell membrane (according to Swiss-Prot)

Database entries

• Structure: 1QW8 (complex with Ara-alpha-Xyl, Geobacillus stearothermophilus), 1PZ3 (Geobacillus stearothermophilus)

• UniProt: P94531

• KEGG entry: [3]

• E.C. number: 3.2.1.55

Expression and regulation

• Operon: araA-araB-araD-araL-araM-araN-araP-araQ-abfA

• Sigma factor: SigA

• Regulation: repressed by glucose (CcpA)
  • repressed in the absence of arabinose (AraR) PubMed

• Regulatory mechanism: CcpA: transcription repression
  • AraR: transcription repression PubMed

• Additional information:

Biological materials

• Mutant:

• Expression vector:

• lacZ fusion:

• GFP fusion:

• two-hybrid system:

• Antibody:

References

José Manuel Inácio, Isabel Lopes Correia, Isabel de Sá-Nogueira
Two distinct arabinofuranosidases contribute to arabino-oligosaccharide degradation in Bacillus subtilis.
Microbiology (Reading): 2008, 154(Pt 9);2719-2729
[PubMed:18757805] [WorldCat.org] [DOI] (P p)

Maria Paiva Raposo, José Manuel Inácio, Luís Jaime Mota, Isabel de Sá-Nogueira
Transcriptional regulation of genes encoding arabinan-degrading enzymes in Bacillus subtilis.
J Bacteriol: 2004, 186(5);1287-96
[PubMed:14973026] [WorldCat.org] [DOI] (P p)

José Manuel Inácio, Carla Costa, Isabel de Sá-Nogueira
Distinct molecular mechanisms involved in carbon catabolite repression of the arabinose regulon in Bacillus subtilis.
Microbiology (Reading): 2003, 149(Pt 9);2345-2355
[PubMed:12949161] [WorldCat.org] [DOI] (P p)

L J Mota, P Tavares, I Sá-Nogueira
Mode of action of AraR, the key regulator of L-arabinose metabolism in Bacillus subtilis.
Mol Microbiol: 1999, 33(3);476-89
[PubMed:10417639] [WorldCat.org] [DOI] (P p)

Isabel Sa-Nogueira, Teresa V Nogueira, Snia Soares, Hermnia de Lencastre
The Bacillus subtilis L-arabinose (ara) operon: nucleotide sequence, genetic organization and expression.
Microbiology (Reading): 1997, 143 ( Pt 3);957-969
[PubMed:9084180] [WorldCat.org] [DOI] (P p)