Table 2.

Selection of Taxa Having Different Pathways for Q Biosynthesis and Q-Reacting Enzymes

				Q-Reacting Enzymes					Anaerobic
Organism	Genome	Ubi Genes for Q Biosynthesis	Q Pathway	Complex I	Complex II	bc1	bd Oxidase	AOX	FeFe-HydA
Alpha
Alphaproteobacteria bacterium GWF2_58_20	97.3%a	UbiA, JDX, E, B, G	a	incomplete	no	no	no	yes	yes
Phaeospirillum fulvum	97.3%a	UbiA, D, X, E, B, G	a + CoQ9	yes, split operon	yes	yes	yes	no	yes
Magnetococcus marinus	complete	UbiC, A, D, X, EJB, G	a	yes, ancestral	yes	yes	no	no	no
Magnetospirillum magneticum AMB-1	complete	UbiA, D, X, E, B, G, 2L	m + DX	yes	yes	yes	yes	no	no
Ca. Endolissoclinum faulkneri L2	complete	UbiA, E, B, G, 2L	m—CoQ7	yes	yes	yes	no	no	no
Rhizobium phaseoli Brasil 5	complete	UbiA, E, B, G, L, M	m—CoQ9c	yes, plus green	yes	yes	yes	no	no
Zeta
Proteobacteria bacterium CG1_02_64_396	94.6%a,b	UbiCA, D, X, EJB, G, HI	c	yes	yes	yes	no	no	no
Mariprofundus ferrooxydans PV-1	94.6%a	UbiCA, D, X, E, J, B, G, H, I	c	yes	yes	yes	yes	no	no
Beta
Gallionella capsiferriformans ES-2	complete	UbiC, A, D, X, E, J, B, G, I, H	c	yes	yes	yes	yes	no	no
Rhodoferax ferrireducens T118	complete	UbiC, A, D, X, E, J, B, G, I, H, L, M	c	yes	yes	yes	yes	no	no
Gamma
Thiolapillus brandeum	complete	UbiC, 3A, D, X, E, B, G, F, H, I	c—CoQ7	yes	yes	yes	no	no	no
Escherichia coli str. K-12 substr. MG1655	complete	UbiCA, D, X, EJB, G, F, HI	c—CoQ7	yes, Nuo13	yes	no	yes	no	no

Note.—Ubi genes are contiguous, that is, form a synteny, when not separated by a comma.

^aEstimated with program BUSCO using proteins Arturo 28 May BUSCO, (Simão et al, 2015).

^bEstimated to be 98% complete by another method, Probst et al. (2017).

^cRare combination found only in another strain of R. phaseoli and also Bosea vaviloviae Vaf18 (table 1) among taxa with complete genome.