• Type: Transmembrane (3 classes)
• Class: Alpha-helical polytopic (156 superfamilies)
• Superfamily: Ion channel (VIC) superfamily (24 families) CL0030
• Family: KcsA voltage-gated K+ channels (26 proteins) 1.A.1.1 (TCDB) PF07885 IPR013099 PDBsum
• Species: Streptomyces lividans (22 proteins)
• Localization: Bacterial Gram-positive plasma membrane (374 proteins)

1r3j >> Potassium channel KcsA
Hydrophobic Thickness or Depth	34.8 Å
Tilt Angle	0°
ΔGtransfer	-111.0 kcal/mol
Links to 1r3j	PDB Sum, PDB, MSD, MMDB, Encompass
Topology	subunit C (N terminus cytoplasmic side)
Resolution	1.9
Primary PDB represention	1r3j
Other PDB entries representing this structure	1bl8 (3.2), 1f6g (NMR), 1j95 (2.8), 1jq1 (NMR), 1jq2 (NMR), 1jvm (2.8), 1k4c (2.0), 1k4d (2.3), 1r3i (2.4), 1r3k (2.8), 1r3l (2.41), 1zwi (2.5), 2atk (2.5), 2bob (2.76), 2boc (3.01), 2dwd (2.6), 2dwe (2.5), 2h8p (2.25), 2hg5 (2.75), 2hjf (2.9), 2hvj (2.75), 2hvk (1.9), 2ih1 (2.4), 2ih3 (1.72), 2itc (3.2), 2itd (2.7), 2jk5 (2.4), 2nlj (2.52), 2p7t (2.05), 2qto (3.2), 2w0f (2.4), 3gb7 (2.85), 3hpl (3.2), 3ifx (3.56), 3iga (2.75), 3ogc (3.8), 3or6 (2.7), 3or7 (2.3), 3stl (2.4), 3stz (2.5), 4lbe (2.75), 4lcu (2.75), 4msw (2.06), 5e1a (3.4), 5ebl (2.3), 5ebm (2.5), 5ebw (2.3), 5ec1 (2.75), 5ec2 (2.3), 5j9p (2.85), 5vkh (2.25), 6nfu (2.09), 6nfv (2.13), 6pa0 (2.05), 6w0a (3.24), 6w0f (2.4), 6w0g (2.6), 6w0h (2.6), 6w0i (2.33), 6w0j (2.5)
Number of TM secondary structures	8
Membranome
Uniprot	IGHG1_MOUSE, IGKC_MOUSE, KCSA_STRLI

---

Download OPM File: 1r3j.pdb

PDB Sum, PDB

Topology in Bacterial Gram-positive plasma membrane

	periplasm
	cytoplasmic side

3D view in GLMol | LiteMol | Jmol | iCn3D

Comments: 2k1e and 2kb2 are models of a water-soluble analogue; 1jq1 and 1jq2 are NMR models of a shorter segment. Several structures of the channel, which were deposited to the PDB without proper biomatrix (1zwi, 2atk, 2jk5, 2w0f and 3hpl), are taken from the PDBTM database.