Classification of Transport Proteins According to Substrate Specificity

5. Cellular Macromolecular Export Systems (excluding porins)

Contents

VII.A. Carbohydrates
VII.B. Proteins
VII.C. Nucleic acids
VII.D. Lipids

Substrate TC number Family Energy source Domain of organisms^a

Capsular polysaccharide 3.A.1.101.1 ABC ATP B

Exopolysaccharide 9.A.1.2.1-2 PST ATP/PMF? B

b-Glucan 3.A.1.108.1 ABC ATP G^-

Lipooligosaccharide 2.A.6.3.1 RND PMF G^-

3.A.1.102.1 ABC ATP G^-

Lipopolysaccharide 3.A.1.103.1 ABC ATP G^-

9.A.1.1.1 PST PMF? G^-

Teichoic acid 3.A.1.104.1 ABC ATP G⁺ B

VII.B. Proteins

Autolysins, nucleases 1.A.28-1.A.43 Holins None B, phages

Proteins (bacterial) 1.A.22.1.1 MscL None B

Proteins (Mitol) 9.A.5.1.1 Oxa1 ? Y (Mito)

Proteins (Mitol) 1.A.21.1.1 Bcl-2 None An (Mito)

Protein toxins 1.C.7; 1.C.8 None B

Proteins (redox) 2.A.64 Tat PMF B

Proteins and peptides
(bacteriocidin, bacteriocins,
colicin V, competence factors,
cyclolysin, a-hemolysin,
nisin, pediosin PA-1, proteases,
S-layer proteins, subtilin, etc.) 3.A.1.109-112 ABC ATP B

Proteins 3.A.5.1-8 IISP ATP + PMF B, A, Y, An, Chloro

3.A.7.1.1 IVSP ATP B

3.A.8 MPT ATP/PMF Mito

3.A.9 CEPT ATP/PMF Chloro envelope

Proteins, flagellar
constituents 3.A.6.1.1-2 IIISP ATP B

VII.C. Nucleic acids

DNA (single stranded), DNA-protein complexes 3.A.11 DNA-T ATP B

VII.D. Lipids

Aminophospholipids 3.A.3.8.1-2 P-ATPase ATP An, Y, Fu

Glycolipids 3.A.1.114.1 ABC ATP B

Lipids 3.A.6.4.2 RND PMF B

Lipids (general) 3.A.1.201.1 ABC ATP B, An, Y, Fu

Lipid A 3.A.1.106.1 ABC ATP B

Phospholipids 2.A.31.1.1 AE None An

3.A.1.201.1 ABC ATP B, Y, Fu, An

^a Abbreviations used for types of organisms, organelles and viruses are as follows: B, Bacteria; A, Archaea; E, Eucarya; G^-, Gram-negative bacteria; G⁺, Gram-positive bacteria; Y, yeasts; Fu, fungi; Pr, protozoans; Pl, plants; An, animals; Mito, mitochondria; Chloro, chloroplasts; ER, endoplasmic reticulum; Bp, bacteriophage; V, virus

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Substrate	TC number	Family	Energy source	Domain of organisms^a
Capsular polysaccharide	3.A.1.101.1	ABC	ATP	B
Exopolysaccharide	9.A.1.2.1-2	PST	ATP/PMF?	B
b-Glucan	3.A.1.108.1	ABC	ATP	G^-
Lipooligosaccharide	2.A.6.3.1	RND	PMF	G^-
Lipooligosaccharide	3.A.1.102.1	ABC	ATP	G^-
Lipopolysaccharide	3.A.1.103.1	ABC	ATP	G^-
Lipopolysaccharide	9.A.1.1.1	PST	PMF?	G^-
Teichoic acid	3.A.1.104.1	ABC	ATP	G⁺ B

Autolysins, nucleases	1.A.28-1.A.43	Holins	None	B, phages
Proteins (bacterial)	1.A.22.1.1	MscL	None	B
Proteins (Mitol)	9.A.5.1.1	Oxa1	?	Y (Mito)
Proteins (Mitol)	1.A.21.1.1	Bcl-2	None	An (Mito)
Protein toxins	1.C.7; 1.C.8		None	B
Proteins (redox)	2.A.64	Tat	PMF	B
Proteins and peptides (bacteriocidin, bacteriocins, colicin V, competence factors, cyclolysin, a-hemolysin, nisin, pediosin PA-1, proteases, S-layer proteins, subtilin, etc.)	3.A.1.109-112	ABC	ATP	B
Proteins	3.A.5.1-8	IISP	ATP + PMF	B, A, Y, An, Chloro
	3.A.7.1.1	IVSP	ATP	B
	3.A.8	MPT	ATP/PMF	Mito
	3.A.9	CEPT	ATP/PMF	Chloro envelope
Proteins, flagellar constituents	3.A.6.1.1-2	IIISP	ATP	B

Aminophospholipids	3.A.3.8.1-2	P-ATPase	ATP	An, Y, Fu
Glycolipids	3.A.1.114.1	ABC	ATP	B
Lipids	3.A.6.4.2	RND	PMF	B
Lipids (general)	3.A.1.201.1	ABC	ATP	B, An, Y, Fu
Lipid A	3.A.1.106.1	ABC	ATP	B
Phospholipids	2.A.31.1.1	AE	None	An
Phospholipids	3.A.1.201.1	ABC	ATP	B, Y, Fu, An