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Table 2 The main function and protein counts of sequence similarity-based protein families between Chlorobium tepidum (‘cct’) and Pelodictyon phaeoclathratiforme (‘ppb’), for Uniprot protein sets

From: A comparison of the protein-coding genomes of two green sulphur bacteria, Chlorobium tepidum TLS and Pelodictyon phaeoclathratiforme BU-1

Groupa

Total proteinsd

cct proteins

ppb proteins

Proposed functionb

1

16

0

16

Pentapeptide repeat protein

3

10

0

10

Transcriptional regulator, XRE family

7

7

0

7

PAS/PAC sensor signal transduction histidine kinase

8

7

1

6

TIR domain protein, TPR repeat-containing protein, SEFIR domain protein

10

7

0

7

Transcriptional regulator, XRE family

12

6

3

3

Magnesium-protoporphyrin methyltransferases, magnesium chelatase

13

6

2

4

Multi-sensor histidine kinase

18

6

0

6

Plasmid maintenance system antidote protein, XRE family

19

5

4

1

Outer surface protein, putative, Hemagglutinin-related protein, Tia invasion determinant-related protein

20

5

0

5

Putative transcriptional regulator

21

5

1

4

Transcriptional regulator, XRE familyc

22

5

0

5

HipA domain protein

23

5

0

5

Ribonuclease VapC (RNase VapC)

24

4

2

2

Transposase

25

4

2

2

Filamentation induced by cAMP protein Fic, Death-on-curing family proteinc

26

4

2

2

Excinuclease ABC, A subunit

27

4

2

2

Bche/P-methylase family protein, Radical SAM domain protein

28

4

3

1

Flp/Fap pilin componentc

31

4

2

2

ATP-dependent zinc metalloprotease FtsH

32

4

1

3

Probable pyruvoyl-dependent arginine decarboxylase

34

4

1

3

Sel1 domain protein repeat-containing proteinc

35

4

0

4

RNA-directed DNA polymerase

37

4

0

4

YapH protein

38

4

0

4

Gas vesicle synthesis GvpLGvpF

40

4

0

4

PilT protein domain protein

41

4

0

4

Transposase IS4 family protein

  1. aThe group number has been arbitrarily assigned by the OrthoMCL program. Groups are provided in Additional file 1
  2. bFunctional annotation was taken from the UniProt database (http://www.uniprot.org) and from [4] and [5], with manual integration of information where it varied within a family. Any group that contained only uncharacterised protein functions were excluded from this table
  3. cSome of the proteins within this family group have yet to be characterised
  4. dOnly groups containing four or more proteins were included