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Table 1 Predicted origin-associated Orc/Cdc6 homologs in the haloarchaeal genomes

From: Diversity and evolution of multiple orc/cdc6-adjacent replication origins in haloarchaea

Organism1

genome

Cdc62

ori-associated Cdc63

Percentage4

Halalkalicoccus jeotgali B3[19] (CP002062-68)

Chromosome

4

2

50%

plasmid 1

3

2

67%

plasmid 2

3

3

100%

plasmid 3#

0

  

plasmid 4#

0

  

plasmid 5#

0

  

Haloarcula hispanica[20] (CP002921-23)

Chromosome

6

2

33%

Chromosome II

4

4

100%

pHH400

1

1

100%

Haloarcula marismortui[21] (AY596290-98)

Chromosome

7

4

57%

Chromosome II

2

2

100%

pNG700

1

1

100%

pNG600

2

1

50%

pNG500

2

2

100%

pNG400*

0

  

pNG300*

1

0

 

pNG200*

0

  

pNG100

1

1

100%

Halobacterium salinarum R15[22] (AM774415-19)

Chromosome

4

3

75%

pHS3

2

1

50%

pHS2

4

3

75%

pHS1*

2

1

50%

pHS4*

0

  

Halobacterium sp. NRC-1 6[23] (AE004437-38; AF016485)

Chromosome

4

3

75%

pNRC200*

4

2

50%

pNRC100*

1

0

 

Haloferax volcanii6[24] (CP001953-57)

Chromosome

8

4

50%

pHV4

4

3

75%

pHV3

1

1

100%

pHV2#[21]

0

  

pHV1

2

2

100%

Halogeometricum borinquense[25] (CP001690-95)

Chromosome

5

2

40%

pHBOR01

1

1

100%

pHBOR02

2

1

50%

pHBOR03

2

2

100%

pHBOR04

1

1

100%

pHBOR05#

0

  

Halomicrobium mukohataei[26] (CP001688-89)

Chromosome

3

1

33%

pHmuk01

1

1

100%

Halopiger xanaduensis (CP002839-42)

Chromosome

9

5

56%

pHALXA01

1

1

100%

pHALXA02

1

1

100%

Haloquadratum walsbyi[27] (AM180088-89)

Chromosome

5

2

40%

pL47#

0

  

Halorhabdus utahensis[28] (CP001687)

Chromosome

5

2

40%

Halorubrum lacusprofundi (CP001365-67)

Chromosome

5

3

60%

Chromosome II

5

4

80%

pHLAC01*

5

4

80%

Haloterrigena turkmenica[29] (CP001860-66)

Chromosome

11

7

64%

pHTUR01

1

1

100%

pHTUR02

1

1

100%

pHTUR03#

0

  

pHTUR04

3

3

100%

pHTUR05#

0

  

pHTUR06#

0

  

Natrialba magadii (CP001932-35)

Chromosome

7

5

71%

pNMAG01

1

1

100%

pNMAG02

1

1

100%

pNMAG03#

0

  

Natronomonas pharaonis[30] (CR936257-59)

Chromosome

4

2

50%

pL131

1

1

100 %

 

pL23#

0

  
  1. 1 Haloarchaeal genomes and their GenBank accession numbers. 2 Number of annotated Orc/Cdc6 proteins; only those greater than 300 amino acids are included. 3 Number of Orc/Cdc6 proteins associated with predicted replication origins. 4 Percentage of predicted origin-associated Orc/Cdc6 proteins. 5 The chromosomes of Halobacterium salinarum R1 are almost identical to those of Halobacterium sp. NRC-1, showing overlapped predicted replication origins of three origins in the chromosome and one each origin in pHS2 and pHS3. 6 Origins were experimentally mapped in these haloarchaea. * Rep genes encoded in these replicons might be responsible for DNA replication initiation. # Both orc/cdc6 and rep genes are absent in these replicons. A gene (Hvo_D0003) in pHV2 of H. volcanii shows low homology with the repH gene.