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Table 1 Examples of horizontally transferred operons

From: Evolution of mosaic operons by horizontal gene transfer and gene displacement in situ

Operon

Recipient organism and correspondent genes

Probable source

Other probable recipients

Comment

Operon acquisition

Pyruvate:ferredoxin oxidoreductase

Thermotoga maritima TM0015-TM0018

Archaea

Aae, Hpy, Bha/Sau

Apparently, the related operon for 2-oxoisovalerate oxidoreductase (TM1758-TM1759) was also transferred from archaea

Sulfate/molybdate transport

Bacillus halodurans BH3128-BH3130

Gram-negative bacteria

-

No other such operons in Bacillus-Clostridium group members

Putative effector of murein hydrolase

Pyrococcus horikoshii PH1801-PH1802

Bacteria

Pab, Mac

 

Allophanate hydrolase subunits

Pyrococcus horikoshii PH0987-PH0988

Bacteria

Pab

 

Paralogous operon acquisition

Dipeptide transporter

Vibrio cholerae VC0620-VC0616

Thermotoga/Archaea

Tma

It has several another bacterial operons including VC1091-VC1095

Ribonucleotide reductase alpha and beta subunit

Halobacterium sp. VNG2384G VNG2383G

Bacteria

-

Additional to "archaeal:" Ribonucleotide reductase alpha subunit VNG1644G, beta subunit is apparently lost

Aromatic amino-acid biosynthesis

Halobacterium sp. VNG0384G VNG0386G

Bacteria

-

Paralogs of this pair are VNG1646G-VNG1647G

Xenologous operon displacement

Histidine biosynthesis suboperon

Pseudomonas aeruginosa PA3151-PA3152

Epsilon-Proteobacteria

-

 

Panthothenate synthesis

Campylobacter jejuni Cj0297c-Cj0298c

Gram-positive bacteria

-

 

DNA repair SbcDC

Vibrio cholerae VCA0520-VCA0521

Gram-positive bacteria

-

 

DNA gyrase A and B

Halobacterium sp. VNG0887G-VNG0889G

Bacteria

Hbs, Tac, Tvo, Afu,

 

Dipeptide transporter

Streptococcus pyogenes SPy2000-SPy2004

Gamma-Proteobacteria

-

 

Glutamate synthase complex

Thermotoga maritima TM0394-TM0398

Archaea

-

There is another homolog for gene TM0397 of possible archaeal origin

NADH:ubiquinone oxidoreductase

Halobacterium sp. VNG0635G-VNG0637G

Bacteria

-

 

Phosphate transporter

Methanothermobacter thermoautotrophicum MTH1727-MTH1734

Bacteria

-

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