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Table 1 Twenty proteins constitute the common secretome of P. acnes.

From: Proteomic identification of secreted proteins of Propionibacterium acnes

Gene ID

Updated annotation

Protein family/domains/origin of closest ortholog

Secretion signala

Phylo-type

Semi-quantificationb/comments

PPA0532

conserved hypothetical protein

Corynebacterium

SP, TAT

IA, IB, III

++

PPA0533

conserved hypothetical protein

Corynebacterium

SP

IA, IB, II, III

+

PPA0534

conserved hypothetical protein

Corynebacterium

SP

IA, IB

+

PPA0598

putative protease

peptidase S8/S53 superfamily;

Arthrobacter

SP, (TAT)

IA, IB

+

PPA0644

putative endo-glycoceramidase

cellulase, glycoside hydrolase family 5; Corynebacterium

(SP), TAT

IA, IB, III

++/42% identity to PPA2106

PPA0687

CAMP2

CAMP factor superfamily; Mobiluncus curtisii, Streptococcus

SP

IA, IB, II, III

+++

PPA0721

putative invasion-associated protein; NlpC/P60 family

NlpC/P60 family;

Kribbella flavida, Streptomyces

SP, TAT

IA, IB, II, III

+++/NlpC/P60 is found in cell wall hydrolases

PPA0816

glyceraldehyde 3-phosphate dehydrogenase

GAPDH

no

IB, II, III

+

PPA1310

putative protease

PDZ superfamily;

Kribbella flavida, Streptomyces

Internal SP (wrong N-terminus)

IA, IB, II, III

+/PDZ is a signaling domain

PPA1498

putative phosphoesterase

metallo-dependent phosphatase superfamily; Rhodococcus

TAT

IA, IB, II

+

PPA1662

putative lysozyme

CH-type (chalaropsis-type) lysozyme, glycoside hydrolase family 25; Streptomyces

SP, TAT

IB, II, III

+++

PPA1715

hypothetical protein, specific to P. acnes

 

SP

IA, IB

+/17 PT repeats

PPA1939

hypothetical protein, specific to P. acnes

 

SP

IA, IB, II, III

+++

PPA2097

putative 5'-nucleotidase, metallo-phosphoesterase

UshA (5'-nucleotidase/2',3'-cyclic phosphodiesterase and related esterases); Jonesia denitrificans

SP, TAT

IB, II

+

PPA2105

triacylglycerol lipase

lipase class 2, esterase/lipase superfamily; Rhodococcus

SP

IA, IB, II, III

++

PPA2106

putative endoglycoceramidase

cellulase, glycoside hydrolase family 5; Nocardioides

SP, (TAT)

IA, IB, II, III

+/42% identity to PPA0644

PPA2142

putative lysophospholipase

alpha/beta-hydrolase superfamily, PldB; Corynebacterium

SP, TAT

IB, II

+

PPA2164

putative beta-N-acetyl-glucosaminidase

glycoside hydrolase family 3; Arthrobacter

SP

IA, IB, II

++

PPA2175

hypothetical protein, with SH3 and RlpA domains, specific to P. acnes

SH3 (type 3) domain; peptidoglycan-binding domain; C-terminus: DPBB_1 (RlpA-like double-psi beta-barrel)

SP, TAT

IB, II

+++/SH3: Src homology 3 domain

PPA2239

putative peptidase/glycosyl hydrolase

DUF348 superfamily;

G5 domain; C-terminus: DPBB_1 (RlpA-like double-psi beta-barrel); Janibacter

SP

IA, IB, II, III

++/G5: a potential N-acetylglucosamine recognition domain

  1. At least three of the five P. acnes strains secrete the listed proteins; see additional file 2 for a complete list of identified proteins. Re-annotation was performed for each gene. a SP, signal peptide; TAT, twin-arginine motif; b Semi-quantification based on Coomassie stained gels