Table 1.

List of structurally characterized BMC-domain proteins from the carboxysome and their dimensions

Pfam00936 protein	Carboxysome type	Hexamer diameterb (Å)	Hexamer edge lengthc (Å)	Pore residues	Pore diameter (Å)
CsoS1A [2G13]	α	72	36	FVGG	4
CsoS1C [3H8Y]	α	72	36	FVGG	4
CcmK1 [3BN4]	β	75	37	KIGS	4.8 (5.5)
CcmK2 [2A1B]	β	75	35	KIGS	5.5 (7)
CcmK4 [2A10]	β	75	37	RAGS	4
CsoS1Da [3F56]	α	72	36	ERAF	12.5 (14)

PDB IDs of the listed structures are in brackets. ^aCsoS1D is a tandem BMC-domain protein; values for the dimensions of the pseudohexamer are reported. ^b Hexamer diameter was measured from one vertex to its opposite vertex. ^c Hexamer edge length was measured from one vertex to its shared edge vertex. Dimensions of the hexamers were measured using PyMOL (DeLano 2002), and all pore diameters were measured for this study using HOLE (Smart et al. 1996). Previously published pore diameters are in parenthesis if the difference was >0.5 Å between this analysis and published values