Gas vesicles are hollow, gas filled proteinaceous nanostructures found in some microorganisms. During planktonic growth they allow positioning of the organism at a favorable depth for light or nutrient acquisition. GvpA forms the protein shell.
The gas vesicle shell is 2 nm thick and consists of a single layer of this protein. It forms helical ribs nearly perpendicular to the long axis of the vesicle.
Antenna complexes are light-harvesting systems, which transfer the excitation energy to the reaction centers.
Belongs to the antenna complex beta subunit family.
Belongs to the bacterial ribosomal protein bL33 family.