Archaea Signal Recognition Particle Shows the Way

Table 1

High-resolution structures of archaeal SRP components. Indicated are the archaea subdomains (Crenarchaeota or Euryarchaeota), species names, components, and methods (X-Ray diffraction of NMR) used for structure determination. The pdb IDs allow easy retrieval of the coordinates [18]. The protein-conducting channel is abbreviated as PCC. Additional nonarchaea SRP high-resolution structures are listed at http://rnp.uthct.edu/rnp/SRPDB/srpstructures.html.

Subdomains	Species	Components	Methods	pdb	References
Crenarchaeota	Acidianus ambivalens	SRP54NG	X-Ray	1J8M,1J8Y	[19]
	Sulfolobus solfactaricus	SRP54 with helix 8	X-Ray	1QZW	[20]
		SRP54 dimer	X-Ray	1QZX	[20]
		SRP54 with signal peptide	X-Ray	3KL4	[21]
		SRP19 with helix 6 and helix 8	X-Ray	3KTV,3KTW	[22]
Euryarchaeota	Archaeoglobus fulgidus	SRP19	NMR	1KVN,1KVV	[23]
		SRP54M	NMR	2JQE	[24]
	Methanococcus jannaschii	SRP19 with SRP54 with RNA	X-Ray	2V3C	[25]
		SRP19 with helix 6 and helix 8	X-Ray	1LNG	[26]
		Helix 6 and helix 8	X-Ray	1Z43	[27]
		PCC	X-Ray	1RHZ,1RH5	[28]
	Pyrococcus furiosus	SRP19	X-Ray	3DLU,3DLV,3DM5	[29]
		SRP54	X-Ray	3DLU,3DLV,3DM5	[29]
		FtsY	X-Ray	3E70,3DM9,3DMD	[30]