Crystal structure of the Colicin I receptor Cir from E.coli

Structure of colicin I receptor bound to the R-domain of colicin Ia: implications for protein import.

Si 220 (Rosenbaum-Rock double-crystal monochromator)

SVDDDGET(MSE)VVTASSVEQNLKDAPASISVITQEDLQRKPVQNLKDVLKEVPGVQLTNEGDNRKGVSIRGLDSSYTL
ILVDGKRVNSRNAVFRHNDFDLNWIPVDSIERIEVVRGP(MSE)SSLYGSDALGGVVNIITKKIGQKWSGTVTVDTTIQE
HRDRGDTYNGQFFTSGPLIDGVLG(MSE)KAYGSLAKREKDDPQNSTTTDTGETPRIEGFSSRDGNVEFAWTPNQNHDFT
AGYGFDRQDRDSDSLDKNRLERQNYSVSHNGRWDYGTSELKYYGEKVENKNPGNSSPITSESNTVDGKYTLPLTAINQFL
TVGGE(MSE)RHDK(MSE)SDAVNLTGGTSSKTSASQYALFVEDEWRIFEPLALTTGVR(MSE)DDHETYGEHWSPRAYL
VYNATDTVTVKGGWATAFKAPSLLQLSPDWTSNSCRGACKIVGSPDLKPETSESWELGLYY(MSE)GEEGWLEGVESSVT
VFRNDVKDRISISRTSDVNAAPGYQNFVGFETGANGRRIPVFSYYNVNKARIQGVETELKIPFNDEWKLSINYTYNDGRD
VSNGENKPLSDLPFHTANGTLDWKPLALEDWS(MSE)Y(MSE)SGHYTGQKRADSATAKTPGGYTIWNTGAAWQVTKDVK
LRAGVLNLGDKDLSRDDYSYNEDGRRYF(MSE)AVDYRF

SVDDDGETMVVTASSVEQNLKDAPASISVITQEDLQRKPVQNLKDVLKEVPGVQLTNEGDNRKGVSIRGLDSSYTLILVD
GKRVNSRNAVFRHNDFDLNWIPVDSIERIEVVRGPMSSLYGSDALGGVVNIITKKIGQKWSGTVTVDTTIQEHRDRGDTY
NGQFFTSGPLIDGVLGMKAYGSLAKREKDDPQNSTTTDTGETPRIEGFSSRDGNVEFAWTPNQNHDFTAGYGFDRQDRDS
DSLDKNRLERQNYSVSHNGRWDYGTSELKYYGEKVENKNPGNSSPITSESNTVDGKYTLPLTAINQFLTVGGEMRHDKMS
DAVNLTGGTSSKTSASQYALFVEDEWRIFEPLALTTGVRMDDHETYGEHWSPRAYLVYNATDTVTVKGGWATAFKAPSLL
QLSPDWTSNSCRGACKIVGSPDLKPETSESWELGLYYMGEEGWLEGVESSVTVFRNDVKDRISISRTSDVNAAPGYQNFV
GFETGANGRRIPVFSYYNVNKARIQGVETELKIPFNDEWKLSINYTYNDGRDVSNGENKPLSDLPFHTANGTLDWKPLAL
EDWSMYMSGHYTGQKRADSATAKTPGGYTIWNTGAAWQVTKDVKLRAGVLNLGDKDLSRDDYSYNEDGRRYFMAVDYRF

7-8 G/L PROTEIN IN 0.02M TRIS
PH7.5, 0.001M EDTA, 0.3M NACL, 1% N-OCTYL-2-HYDROXYETHYL
SULFOXIDE MIXED AT 1:1 RATIO WITH 0.1M TRIS PH7.5, 0.02-0.05M
SRCL2, 5% ISOPROPANOL, 32-40 % PEG 2000 MME, VAPOR DIFFUSION, HANGING DROP, temperature 294K

THE SAME PROTEIN IN COMPLEX WITH THE R-DOMAIN OF COLICIN IA

HYDROGENS HAVE BEEN ADDED IN THE RIDING POSITIONS

Outer membrane, Iron transport, TonB box, Signal transduction, Colicin I Receptor, Membrane Protein, PROTEIN TRANSPORT

VDDDGETMVVTASSVEQNLKDAPASISVITQEDLQRKPVQNLKDVLKEVPGVQLTNEGDNRKGVSIRGLDSSYTLILVDG
KRVNSRNAVFRHNDFDLNWIPVDSIERIEVVRGPMSSLYGSDALGGVVNIITKKIGQKWSGTVTVDTTIQEHRDRGDTYN
GQFFTSGPLIDGVLGMKAYGSLAKREKDDPQNSTTTDTGETPRIEGFSSRDGNVEFAWTPNQNHDFTAGYGFDRQDRDSD
SLDKNRLERQNYSVSHNGRWDYGTSELKYYGEKVENKNPGNSSPITSESNTVDGKYTLPLTAINQFLTVGGEWRHDKLSD
AVNLTGGTSSKTSASQYALFVEDEWRIFEPLALTTGVRMDDHETYGEHWSPRAYLVYNATDTVTVKGGWATAFKAPSLLQ
LSPDWTSNSCRGACKIVGSPDLKPETSESWELGLYYMGEEGWLEGVESSVTVFRNDVKDRISISRTSDVNAAPGYQNFVG
FETGANGRRIPVFSYYNVNKARIQGVETELKIPFNDEWKLSINYTYNDGRDVSNGENKPLSDLPFHTANGTLDWKPLALE
DWSFYVSGHYTGQKRADSATAKTPGGYTIWNTGAAWQVTKDVKLRAGVLNLGDKDLSRDDYSYNEDGRRYFMAVDYRF