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Table 5 Over-represented SCOP folds in minimal organisms. Which SCOP folds are most over-represented in minimal organisms, relative to E. coli? The first column gives the name and SCOP sccs identifier for folds from SCOP 1.67. The second column gives the total number of domains with each fold among the five organisms. The third column is calculated as the average number of domains among the five minimal organisms studied that were assigned to each fold, divided by the number of domains in E. coli assigned to the same fold. 37 other folds also have a ratio of 1.0 and 1 representative in each minimal organism.

From: Structural proteomics of minimal organisms: Conservation of protein fold usage and evolutionary implications

Fold Name

Number

Ratio

DNA primase core (e.13)

7

1.4

An anticodon-binding domain of class I aminoacyl-tRNA synthetases (a.97)

6

1.2

Head domain of nucleotide exchange factor GrpE (b.73)

6

1.2

Ribosomal proteins L23 and L15e (d.12)

6

1.2

DNA clamp (d.131)

16

1.1

ValRS/IleRS/LeuRS editing domain (b.51)

15

1.0

S-adenosylmethionine synthetase (d.130)

15

1.0

Dihydrofolate reductases (c.71)

10

1.0

Ribosomal protein L6 (d.141)

10

1.0

beta and beta-prime subunits of DNA dependent RNA- polymerase (e.29)

10

1.0