Fig. 1.

Homology alignment of amino acid sequences of UDP-sulfoquinovose synthases from plants, green algae, (cyano)bacteria, and archaea. a Alignment of selected regions of UDP-sulfoquinovose synthases showing the identical amino acids (colored in red) from S. acidocaldarius, plants, (cyano)bacteria, and selected species from thermophilic and extreme halophilic archaea. b Phylogenetic relationship of UDP-sulfoquinovose synthases from archaea, (cyano)bacteria, and plants. The designation of organisms and genes used for the construction of the phylogenetic tree is (in alphabetical order): Arabidopsis thaliana, SQD1; Brevundimonas subvibrioides, Bresu_0487; Caldilinea aerophila, CLDAP_14360; Caldivirga maquilingensis, Cmaq_1419; Cyanidioschyzon merolae strain 10D, CYME_CMR012C; Cyanobacterium UCYNA, UCYN_02170; Haladaptatus paucihalophilus, ZOD2009_14291; Haloquadratum walsbyi, SqdB; Halorhabdus utahensis, Huta_1116; Ketogulonicigenium vulgare, EIO_0713; Microcystis aeruginosa NIES-843, MAE_49250; Mycobacterium vanbaalenii, Mvan_5143; Natrinema sp. J7-2, NJ7G_0131; Nitrosococcus oceani ATCC 19707, Noc_1509; Phaeodactylum tricornutum CCAP 1055/1, PHATR_21201; Propionibacterium freudenreichii, PFREUD_00050; Rhizobium leguminosarum bv. trifolii, Rleg2_3206; Rhodobacter sphaeroides, RSP_2569; Ricinus communis, RCOM_0797290; Roseiflexus castenholzii, Rcas_0045; Saccharopolyspora erythraea, SACE_5690; Selaginella moellendorffii, SELMODRAFT_179226; Sulfolobus acidocaldarius, Agl3; Synechococcus sp., sync_0053; Synechococcus sp. PCC 7002, SYNPCC7002_A0847; Synechocystis sp. PCC 6803, slr1020; Thermoplasma acidophilum, NP_394533; Thermosynechococcus elongatus, tll0398; Vitis vinifera, LOC100242408; Volvox carteri f. nagariensis, VOLCADRAFT_109932; Vulcanisaeta distributa, Vdis_0939