MpeV family
Description
MpeV is present only in marine Synechococcus strains belonging to pigment type 3dA, one of the two kinds of type IV chromatic acclimaters. MpeV has been biochemically characterized as a PEB:Cys-50,61 β-PEI and β-PEII lyase-isomerase in Synechococcus strain RS9916 (Carrigee et et al. 2021). Of note, the Cys-50-61 β-PEI of another 3dA strain WH8020 binds a PEB and not a PUB (Ong & Glazer, 1991). This discrepancy has been associated with the occurrence of a histidine at position 141 of the PEI β-subunit from WH8020, instead of a leucine in its counterpart from RS9916: this histidine was found to prevent the isomerization activity of MpeV (Carrigee et al. 2022).
References
- Carrigee et al., 2021. MpeV is a lyase isomerase that ligates a doubly linked phycourobilin on the β-subunit of phycoerythrin I and II in marine Synechococcus J Biol Chem, 296, 100031.
- Carrigee et al., 2022. The phycoerythrobilin isomerization activity of MpeV in Synechococcus sp. WH8020 is prevented by the presence of a histidine at position 141 within its phycoerythrin-I β-subunit substrate Front Microbiol, 13, 893413.
- Ong et al., 1991. Phycoerythrins of marine unicellular cyanobacteria. I. Bilin types and locations and energy transfer pathways in Synechococcus spp. phycoerythrins J Biol Chem, 266, 9515-9527.
Showing only unsure genes
| Gene | Locus tag | Genbank | Species | Strain | PBP in rods | Pigment type | Remark | Length | Last change |
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Model strains, Marine strains
Last update: 21 Apr 2023 5:54:10
