Table 4.

Shedding of Lipoproteins and Autolysins by Bacillus subtilis Δlgt

Proteins Function/Similarity 168 ΔIgt
Metabolism of the cell wall
LytDW N-acetylglucosaminidase (major autolysin)+ +++
PbpClipo penicillin-binding protein 3− +++
YodJlipo D-alanyl-D-alanine carboxypeptidase− +++
YvcEW cell wall-binding protein+ +++
Transport/binding proteins and lipoproteins
FeuAlipo iron-uptake system (binding protein)− +++
FhuDlipo ferrichrome ABC transporter (binding protein)− ++
MntAlipo manganese ABC transporter (binding protein)+ +++
MsmElipo multiple sugar ABC transporter (binding protein)− ++
OppAlipo oligopeptide ABC transporter (binding protein)+ +++
OpuAClipo pst glycine betaine ABC transporter (binding protein)− +++
PstSlipo pst phosphate ABC transporter (binding protein)++ +++
RbsBlipo ribose ABC transporter (binding protein)− +++
YcdHlipo pst zinc ABC transporter (binding protein)+ +++
YclQlipo ferrichrome ABC transporter (binding protein)+++ +++
YdhFRR lipo pst similar to unknown proteins from B. subtilis + ++
YfiYlipo iron(III) dicitrate ABC transporter (binding protein)− +++
YfmClipo ferrichrome ABC transporter (binding protein)+ +++
YqiXlipo pst amino acid ABC transporter (binding protein)+ +++
YrpElipo pst similar to unknown proteins from B. subtilis − +++
YusAlipo probably part of the S box regulon− +++
YxeBlipo ferrichrome ABC transporter (binding protein)− +++
Information pathways RNA synthesis/regulation
YwtFtranscriptional regulator (similar tolytR)+ +++
Phage-related functions
XepAPBSX prophage lytic exoenzyme+ +++
XlyAN-acetylmuramoyl-L-alanine amidase+ +++

[i] The absence of proteins from the extracellular proteome of the parental strain 168 is indicated with −, and their presence with +, ++, or +++ if the protein is present at low, average, or high levels, respectively. Proteins present at elevated levels in the medium of theΔIgt strain are indicated with ++ or +++. Proteins that are induced upon phosphate starvation are indicated withpst. Proteins with a twin-arginine motif in the signal peptide are marked RR. Lipoproteins are indicated withlipo. Extracellular proteins containing typical wall-binding repeats in the mature part are marked with W.