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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.