MpeZ family
Description
MpeZ is specific of marine Synechococcus belonging to pigment type 3dA, one of two kinds of type IV chromatic acclimaters. The mpeZ gene is located in the CA4-A genomic island, which also comprises the transcriptional regulators fciA-B-C and the yet uncharacterized gene unk10 (Humily et al. 2013; Sanfilippo et al. 2016, 2019). The CA4-A island is generally localized outside the main phycobilisome rod region, with rare exceptions (Grébert et al. 2022). MpeW has been biochemically characterized as a PEB:Cys-83 alpha-PEII lyase-isomerase in Synechococcus strain RS9916 (Shukla et al. 2012). In this and other pigment type 3dA strains, this site binds a PUB in blue light and a PEB in green light, as the result of a competition between the constitutively expressed PEB lyase gene mpeY and the PEB lyase-isomerase gene mpeZ, which is strongly activated in blue light but repressed in green light (Humily et al. 2013; Sanfilippo et al. 2019).
Motif
A motif characterising this family is available.
References
- Grébert et al., 2022. Diversity and evolution of pigment types in marine Synechococcus cyanobacteria Genome Biol Evol, 14, evac035.
- Humily et al., 2013. A gene island with two possible configurations is involved in chromatic acclimation in marine Synechococcus PLoS One, 8, e84459.
- Sanfilippo et al., 2019. Interplay between differentially expressed enzymes contributes to light color acclimation in marine Synechococcus Proc Natl Acad Sci USA, 116, 6457-6462.
- Sanfilippo et al., 2016. Self-regulating genomic island encoding tandem regulators confers chromatic acclimation to marine Synechococcus Proc Natl Acad Sci USA, 113, 6077-6082.
- Shukla et al., 2012. Phycoerythrin-specific bilin lyase-isomerase controls blue-green chromatic acclimation in marine Synechococcus Proc Natl Acad Sci USA, 49, 20136-20141.
Showing only unsure genes
| Gene | Locus tag | Genbank | Species | Strain | PBP in rods | Pigment type | Remark | Length | Last change |
|---|
Model strains, Marine strains
Last update: 21 Apr 2023 7:14:18
