2ZXE - JenaLib

Asym./Biol. Unit - manually (Jmol Viewer)

Asym./Biol. Unit (Jmol Viewer)

Asym./Biol. Unit - sites (Jmol Viewer)

Title :   CRYSTAL STRUCTURE OF THE SODIUM - POTASSIUM PUMP IN THE E2.2K+.PI STATE

Authors :   T. Shinoda, H. Ogawa, F. Cornelius, C. Toyoshima

Date :   22 Dec 08 (Deposition) - 19 May 09 (Release) - 13 Jul 11 (Revision)

Method :   X-RAY DIFFRACTION

Resolution :   2.40

Chains :   Asym./Biol. Unit : A,B,G

Keywords :   Membrane Protein, Ion Pump, Atpase, K+ Binding, Haloacid Dehydrogenease Superfamily, Phosphate Analogue, Atp-Binding, Hydrolase, Ion Transport, Nucleotide-Binding, Phosphoprotein, Hydrolase-Transport Protein Complex (Keyword Search: [Gene Ontology, PubMed, Web (Google)] )

Reference :   T. Shinoda, H. Ogawa, F. Cornelius, C. Toyoshima
Crystal Structure Of The Sodium - Potassium Pump At 2. 4 A Resolution
Nature V. 459 446 2009
PubMed-ID: 19458722 | Reference-DOI: 10.1038/NATURE07939

Molecule 1 - NA, K-ATPASE ALPHA SUBUNIT
	Chains	:	A
	Organism Common	:	SPINY DOGFISH
	Organism Scientific	:	SQUALUS ACANTHIAS
	Organism Taxid	:	7797
	Secretion	:	RECTAL GLAND
	Synonym	:	NA+,K+-ATPASE ALPHA SUBUNIT

Molecule 2 - NA+,K+-ATPASE BETA SUBUNIT
	Chains	:	B
	Organism Common	:	SPINY DOGFISH
	Organism Scientific	:	SQUALUS ACANTHIAS
	Organism Taxid	:	7797
	Secretion	:	RECTAL GLAND

Molecule 3 - PHOSPHOLEMMAN-LIKE PROTEIN
	Chains	:	G
	Organism Common	:	SPINY DOGFISH
	Organism Scientific	:	SQUALUS ACANTHIAS
	Organism Taxid	:	7797
	Secretion	:	RECTAL GLAND
	Synonym	:	FXYD10

		1	2	3
Asymmetric/Biological Unit	:	A	B	G

Summary Information (see also Sequences/Alignments below)

Asymmetric/Biological Unit (6, 9)

No.	Name	Count	Type	Full Name
1	CLR	1	Ligand/Ion	CHOLESTEROL
2	K	3	Ligand/Ion	POTASSIUM ION
3	MF4	1	Ligand/Ion	TETRAFLUOROMAGNESATE(2-)
4	MG	1	Ligand/Ion	MAGNESIUM ION
5	NAG	2	Ligand/Ion	N-ACETYL-D-GLUCOSAMINE
6	NDG	1	Ligand/Ion	2-(ACETYLAMINO)-2-DEOXY-A-D-GLUCOPYRANOSE

Asymmetric Unit (9, 9)

No.	Name	Evidence	Residues	Description
1	AC1	SOFTWARE	THR A:219 , GLY A:220 , GLU A:221 , ASP A:376 , LYS A:377 , THR A:378 , THR A:617 , GLY A:618 , ASP A:619 , LYS A:698 , ASN A:720 , MG A:2002 , HOH A:5055 , HOH A:5058	BINDING SITE FOR RESIDUE MF4 A 2001
2	AC2	SOFTWARE	ASP A:376 , THR A:378 , ASP A:717 , MF4 A:2001 , HOH A:5055 , HOH A:5058	BINDING SITE FOR RESIDUE MG A 2002
3	AC3	SOFTWARE	THR A:779 , SER A:782 , ASN A:783 , ASP A:811 , HOH A:5010	BINDING SITE FOR RESIDUE K A 2003
4	AC4	SOFTWARE	VAL A:329 , ALA A:330 , VAL A:332 , GLU A:334 , ASN A:783 , GLU A:786 , ASP A:811	BINDING SITE FOR RESIDUE K A 2004
5	AC5	SOFTWARE	LEU A:725 , LYS A:726 , ALA A:728 , ASP A:747 , HOH A:5039	BINDING SITE FOR RESIDUE K A 2005
6	AC6	SOFTWARE	GLU A:847 , SER A:851 , ILE B:36 , TYR B:40	BINDING SITE FOR RESIDUE CLR A 3001
7	AC7	SOFTWARE	ASP B:111 , ASN B:114 , SER B:116 , ARG B:154 , NDG B:4002	BINDING SITE FOR RESIDUE NAG B 4001
8	AC8	SOFTWARE	NAG B:4001	BINDING SITE FOR RESIDUE NDG B 4002
9	AC9	SOFTWARE	ASN B:159 , GLU B:230	BINDING SITE FOR RESIDUE NAG B 4021

Asymmetric/Biological Unit

No.	Residues
1	B:127	-	B:150
2	B:160	-	B:176
3	B:215	-	B:278

Asymmetric/Biological Unit

No.	Residues
1	Ser B:122	-	Pro B:123
2	Tyr B:245	-	Pro B:246

(no "SAP(SNP)/Variant" information available for 2ZXE)

(no "PROSITE Motif" information available for 2ZXE)

(no "Exon" information available for 2ZXE)

Asymmetric/Biological Unit

Reformat:	Number of residues per line = ('0' or empty: single-line sequence representation)
	Number of residues per labelling interval =
	UniProt sequence: complete aligned part

Show mapping:	SCOP domains	CATH domains	Pfam domains	Secondary structure (by author)
	SAPs(SNPs)	PROSITE motifs	Exons
	(details for a mapped element are shown in a popup box when the mouse pointer rests over it)

Chain A from PDB  Type:PROTEIN  Length:992
 aligned with Q4H132_SQUAC | Q4H132 from UniProtKB/TrEMBL  Length:1028

    Alignment length:992
                                    46        56        66        76        86        96       106       116       126       136       146       156       166       176       186       196       206       216       226       236       246       256       266       276       286       296       306       316       326       336       346       356       366       376       386       396       406       416       426       436       446       456       466       476       486       496       506       516       526       536       546       556       566       576       586       596       606       616       626       636       646       656       666       676       686       696       706       716       726       736       746       756       766       776       786       796       806       816       826       836       846       856       866       876       886       896       906       916       926       936       946       956       966       976       986       996      1006      1016      1026  
        Q4H132_SQUAC     37 LDELKKEVSMDDHKLSLDELHNKYGTDLTRGLTNARAKEILARDGPNSLTPPPTTPEWIKFCRQLFGGFSILLWIGAILCFLAYGIQAATEDEPANDNLYLGVVLSTVVIVTGCFSYYQEAKSSRIMDSFKNMVPQQALVIRDGEKSTINAEFVVAGDLVEVKGGDRIPADLRIISAHGCKVDNSSLTGESEPQTRSPEFSSENPLETRNIAFFSTNCVEGTARGVVVYTGDRTVMGRIATLASGLEVGRTPIAIEIEHFIHIITGVAVFLGVSFFILSLILGYSWLEAVIFLIGIIVANVPEGLLATVTVCLTLTAKRMARKNCLVKNLEAVETLGSTSTICSDKTGTLTQNRMTVAHMWFDNQIHEADTTENQSGAAFDKTSATWSALSRIAALCNRAVFQAGQDNVPILKRSVAGDASESALLKCIELCCGSVQGMRDRNPKIVEIPFNSTNKYQLSIHENEKSSESRYLLVMKGAPERILDRCSTILLNGAEEPLKEDMKEAFQNAYLELGGLGERVLGFCHFALPEDKYNEGYPFDADEPNFPTTDLCFVGLMAMIDPPRAAVPDAVGKCRSAGIKVIMVTGDHPITAKAIAKGVGIISEGNETIEDIAARLNIPIGQVNPRDAKACVVHGSDLKDLSTEVLDDILHYHTEIVFARTSPQQKLIIVEGCQRQGAIVAVTGDGVNDSPALKKADIGVAMGISGSDVSKQAADMILLDDNFASIVTGVEEGRLIFDNLKKSIAYTLTSNIPEITPFLVFIIGNVPLPLGTVTILCIDLGTDMVPAISLAYEQAESDIMKRQPRNPKTDKLVNERLISMAYGQIGMIQALGGFFSYFVILAENGFLPMDLIGKRVRWDDRWISDVEDSFGQQWTYEQRKIVEFTCHTSFFISIVVVQWADLIICKTRRNSIFQQGMKNKILIFGLFEETALAAFLSYCPGTDVALRMYPLKPSWWFCAFPYSLIIFLYDEMRRFIIRRSPGGWVEQETYY 1028
               SCOP domains -------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------- SCOP domains
               CATH domains 2zxeA01 A:32-77,A:157-276                     ----------------2zxeA02 A:94-147,A:277-370,A:756-1023                 ---------2zxeA01 A:32-77,A:157-276 Calcium-transporting ATPase, cytoplasmic transduction domain A                                2zxeA02 A:94-147,A:277-370,A:756-1023 Calcium-transporting ATPase, transmembrane domain       2zxeA03      2zxeA04 A:384-594 Calcium-transporting ATPase, cytoplasmic domain N                                                                                                                                                2zxeA03 A:371-383,A:595-755  [code=3.40.50.1000, no name defined]                                                                                                2zxeA02 A:94-147,A:277-370,A:756-1023 Calcium-transporting ATPase, transmembrane domain                                                                                                                                                                                      CATH domains
               Pfam domains -----------Cation_ATPase_N-2zxeA03 A:43-111                                     -----------------------E1-E2_ATPase-2zxeA04 A:135-366                                                                                                                                                                                                          ---Hydrolase-2zxeA01 A:370-729                                                                                                                                                                                                                                                                                                                                             ---------------------------------------------------------------------Cation_ATPase_C-2zxeA02 A:799-1008                                                                                                                                                                                --------------- Pfam domains
         Sec.struct. author ...............hhhhhhhhhh.......hhhhhhhhhhhhh..........hhhhhhhh....hhhhhhhhhhhhhhhhhhhhhhh.....hhhhhhhhhhhhhhhhhhhhhhhhh....hhhhhhhh....eeeeee..eeeeee.hhh....eeeee.......eeeeeeeeeeeeehhhhhh....ee...............ee....eeeeeeeeeeeeehhhhhhhhhhhhhhhhh....hhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhh..hhhhhhhhhhhhhhhhh..hhhhhhhhhhhhhhhhhhh..eee...hhhhhhhhh.eeee...........eeeeeee..eeee...............hhhhhhhhhhhhhh...ee.......hhhhh.ee.hhhhhhhhhhhhhhhhhhhhhhhhh.eeeee.......eeeeeee........eeeeeeehhhhhhh.eeee.........hhhhhhhhhhhhhhhhhh..eeeeeeeee.......................eeeeeeeeee.....hhhhhhhhhhhh..eeeee...hhhhhhhhhhhh........hhhhhhhhh..hhhhhhhhhh.eeeeehhhhh..hhhhhhhhhhhh.eeeee..hhhhhhhhhhhhhhh...eeeee.hhhhhhhhhhh.eeeee....hhhhhhhh.eee....hhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhh.....hhhhhhhhhh..hhhhhhhhhhh....hhhhh...........hhhhhhhhh.hhhhhhhhhhhhhhhhhhhhh..hhhhhh.hhhhhh......ee.....eehhhhhhhhhhhhhhhhhhhhhhhhhhhhhhh.....hhhhhh..hhhhhhhhhhhhhhhhhhhhh.hhhhhh.....hhhhhhhhhhhhhhhhhhhhhhhhhhhhh..hhhhhhhh. Sec.struct. author
                 SAPs(SNPs) -------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------- SAPs(SNPs)
                    PROSITE -------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------- PROSITE
                 Transcript -------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------- Transcript
                2zxe A   32 LDELKKEVSMDDHKLSLDELHNKYGTDLTRGLTNARAKEILARDGPNSLTPPPTTPEWIKFCRQLFGGFSILLWIGAILCFLAYGIQAATEDEPANDNLYLGVVLSTVVIVTGCFSYYQEAKSSRIMDSFKNMVPQQALVIRDGEKSTINAEFVVAGDLVEVKGGDRIPADLRIISAHGCKVDNSSLTGESEPQTRSPEFSSENPLETRNIAFFSTNCVEGTARGVVVYTGDRTVMGRIATLASGLEVGRTPIAIEIEHFIHIITGVAVFLGVSFFILSLILGYSWLEAVIFLIGIIVANVPEGLLATVTVCLTLTAKRMARKNCLVKNLEAVETLGSTSTICSDKTGTLTQNRMTVAHMWFDNQIHEADTTENQSGAAFDKTSATWSALSRIAALCNRAVFQAGQDNVPILKRSVAGDASESALLKCIELCCGSVQGMRDRNPKIVEIPFNSTNKYQLSIHENEKSSESRYLLVMKGAPERILDRCSTILLNGAEEPLKEDMKEAFQNAYLELGGLGERVLGFCHFALPEDKYNEGYPFDADEPNFPTTDLCFVGLMAMIDPPRAAVPDAVGKCRSAGIKVIMVTGDHPITAKAIAKGVGIISEGNETIEDIAARLNIPIGQVNPRDAKACVVHGSDLKDLSTEVLDDILHYHTEIVFARTSPQQKLIIVEGCQRQGAIVAVTGDGVNDSPALKKADIGVAMGISGSDVSKQAADMILLDDNFASIVTGVEEGRLIFDNLKKSIAYTLTSNIPEITPFLVFIIGNVPLPLGTVTILCIDLGTDMVPAISLAYEQAESDIMKRQPRNPKTDKLVNERLISMAYGQIGMIQALGGFFSYFVILAENGFLPMDLIGKRVRWDDRWISDVEDSFGQQWTYEQRKIVEFTCHTSFFISIVVVQWADLIICKTRRNSIFQQGMKNKILIFGLFEETALAAFLSYCPGTDVALRMYPLKPSWWFCAFPYSLIIFLYDEMRRFIIRRSPGGWVEQETYY 1023
                                    41        51        61        71        81        91       101       111       121       131       141       151       161       171       181       191       201       211       221       231       241       251       261       271       281       291       301       311       321       331       341       351       361       371       381       391       401       411       421       431       441       451       461       471       481       491       501       511       521       531       541       551       561       571       581       591       601       611       621       631       641       651       661       671       681       691       701       711       721       731       741       751       761       771       781       791       801       811       821       831       841       851       861       871       881       891       901       911       921       931       941       951       961       971       981       991      1001      1011      1021

Chain B from PDB  Type:PROTEIN  Length:265
 aligned with C4IX13_SQUAC | C4IX13 from UniProtKB/TrEMBL  Length:305

    Alignment length:278
                                    37        47        57        67        77        87        97       107       117       127       137       147       157       167       177       187       197       207       217       227       237       247       257       267       277       287       297        
        C4IX13_SQUAC     28 RTGSSWFKIFLFYLIFYGCLAGIFIGTIQVLLLTLSDFEPKYQDRVAPPGLSHAPYAIKTEISFSISNPKSYESFVKSMHKLMDLYNESSQAGNSPFEDCSDTPADYIKRGDLDDSQGQKKACRFSRMWLKNCSGLDDTTYGYAEGKPCVVAKLNRIIGFYPKPLKNTTDLPEELQANYNQYVLPLRCAAKREEDREKIGSIEYFGLGGYAGFPLQYYPYYGKRLQKKYLQPLLAIQFTNLTQNMELRIECKVYGENIDYSEKDRFRGRFEVKIEVKS  305
               SCOP domains -------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------- SCOP domains
               CATH domains 2zxeB01 B:28-62                    2zxeB02 B:63-305 Na, k-atpase alpha subunit.                                                                                                                                                                                                        CATH domains
               Pfam domains -------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------- Pfam domains
         Sec.struct. author ....hhhhhhhhhhhhhhhhhhhhhhhhhhhhhh..........................eeee...hhhhhhhhhhhhhhhhhhhhhhhh.....ee.......................ee..hhhhh...--------.........eee.............................eeeeeee.-----......eeeehhhhh.eee.hhh..............eeeeee........eeeeeee..................eeeee.. Sec.struct. author
                 SAPs(SNPs) -------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------- SAPs(SNPs)
                    PROSITE -------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------- PROSITE
                 Transcript -------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------- Transcript
                2zxe B   28 RTGSSWFKIFLFYLIFYGCLAGIFIGTIQVLLLTLSDFEPKYQDRVAPPGLSHAPYAIKTEISFSISNPKSYESFVKSMHKLMDLYNESSQAGNSPFEDCSDTPADYIKRGDLDDSQGQKKACRFSRMWLKNC--------GYAEGKPCVVAKLNRIIGFYPKPLKNTTDLPEELQANYNQYVLPLRCAA-----REKIGSIEYFGLGGYAGFPLQYYPYYGKRLQKKYLQPLLAIQFTNLTQNMELRIECKVYGENIDYSEKDRFRGRFEVKIEVKS  305
                                    37        47        57        67        77        87        97       107       117       127       137       147       157  |      - |     177       187       197       207       217     | 227       237       247       257       267       277       287       297        
                                                                                                                                                              160      169                                             217   223

Chain G from PDB  Type:PROTEIN  Length:39
 aligned with Q70Q12_SQUAC | Q70Q12 from UniProtKB/TrEMBL  Length:94

    Alignment length:39
                                    33        43        53         
        Q70Q12_SQUAC     24 EGPDNDERFTYDYYRLRVVGLIVAAVLCVIGIIILLAGK   62
               SCOP domains --------------------------------------- SCOP domains
               CATH domains --------------------------------------- CATH domains
               Pfam domains --ATP1G1_PLM_MAT8-2zxeG01 G:6-42        Pfam domains
         Sec.struct. author ....hhhhhh.hhhhhhhhhhhhhhhhhhhhhhhhh... Sec.struct. author
                 SAPs(SNPs) --------------------------------------- SAPs(SNPs)
                    PROSITE --------------------------------------- PROSITE
                 Transcript --------------------------------------- Transcript
                2zxe G    4 EGPDNDERFTYDYYRLRVVGLIVAAVLCVIGIIILLAGK   42
                                    13        23        33

Legend:		→ Mismatch	(orange background)
	-	→ Gap	(green background, '-', border residues have a numbering label)
		→ Modified Residue	(blue background, lower-case, 'x' indicates undefined single-letter code, labelled with number + name)
	x	→ Chemical Group	(purple background, 'x', labelled with number + name, e.g. ACE or NH2)
	extra numbering lines below/above indicate numbering irregularities and modified residue names etc., number ends below/above '\|'

(no "SCOP Domain" information available for 2ZXE)

Asymmetric/Biological Unit(hide GO term definitions)

Chain A (Q4H132_SQUAC | Q4H132)

molecular function
	GO:0005524	ATP binding	Interacting selectively and non-covalently with ATP, adenosine 5'-triphosphate, a universally important coenzyme and enzyme regulator.
	GO:0016787	hydrolase activity	Catalysis of the hydrolysis of various bonds, e.g. C-O, C-N, C-C, phosphoric anhydride bonds, etc. Hydrolase is the systematic name for any enzyme of EC class 3.
	GO:0046872	metal ion binding	Interacting selectively and non-covalently with any metal ion.
	GO:0000166	nucleotide binding	Interacting selectively and non-covalently with a nucleotide, any compound consisting of a nucleoside that is esterified with (ortho)phosphate or an oligophosphate at any hydroxyl group on the ribose or deoxyribose.
	GO:0005391	sodium:potassium-exchanging ATPase activity	Catalysis of the transfer of a solute or solutes from one side of a membrane to the other according to the reaction: ATP + H2O + Na+(in) + K+(out) = ADP + phosphate + Na+(out) + K+(in).
biological process
	GO:0090662	ATP hydrolysis coupled transmembrane transport	The transport of molecules across a membrane and against an electrochemical gradient, using energy from ATP hydrolysis.
	GO:0010248	establishment or maintenance of transmembrane electrochemical gradient	The directed movement of ions to establish or maintain an electrochemical gradient across a membrane by means of some agent such as a transporter or pore.
	GO:0006811	ion transport	The directed movement of charged atoms or small charged molecules into, out of or within a cell, or between cells, by means of some agent such as a transporter or pore.
	GO:0006813	potassium ion transport	The directed movement of potassium ions (K+) into, out of or within a cell, or between cells, by means of some agent such as a transporter or pore.
	GO:0006814	sodium ion transport	The directed movement of sodium ions (Na+) into, out of or within a cell, or between cells, by means of some agent such as a transporter or pore.
	GO:0006810	transport	The directed movement of substances (such as macromolecules, small molecules, ions) or cellular components (such as complexes and organelles) into, out of or within a cell, or between cells, or within a multicellular organism by means of some agent such as a transporter, pore or motor protein.
cellular component
	GO:0016021	integral component of membrane	The component of a membrane consisting of the gene products and protein complexes having at least some part of their peptide sequence embedded in the hydrophobic region of the membrane.
	GO:0016020	membrane	A lipid bilayer along with all the proteins and protein complexes embedded in it an attached to it.

Chain B (C4IX13_SQUAC | C4IX13)

biological process
	GO:0006811	ion transport	The directed movement of charged atoms or small charged molecules into, out of or within a cell, or between cells, by means of some agent such as a transporter or pore.
	GO:0006813	potassium ion transport	The directed movement of potassium ions (K+) into, out of or within a cell, or between cells, by means of some agent such as a transporter or pore.
	GO:0006814	sodium ion transport	The directed movement of sodium ions (Na+) into, out of or within a cell, or between cells, by means of some agent such as a transporter or pore.
	GO:0006810	transport	The directed movement of substances (such as macromolecules, small molecules, ions) or cellular components (such as complexes and organelles) into, out of or within a cell, or between cells, or within a multicellular organism by means of some agent such as a transporter, pore or motor protein.
cellular component
	GO:0016021	integral component of membrane	The component of a membrane consisting of the gene products and protein complexes having at least some part of their peptide sequence embedded in the hydrophobic region of the membrane.
	GO:0016020	membrane	A lipid bilayer along with all the proteins and protein complexes embedded in it an attached to it.
	GO:0005890	sodium:potassium-exchanging ATPase complex	Sodium:potassium-exchanging ATPases are tetrameric proteins, consisting of two large alpha subunits and two smaller beta subunits. The alpha subunits bear the active site and penetrate the membrane, while the beta subunits carry oligosaccharide groups and face the cell exterior.

Chain G (Q70Q12_SQUAC | Q70Q12)

molecular function
	GO:0005216	ion channel activity	Enables the facilitated diffusion of an ion (by an energy-independent process) by passage through a transmembrane aqueous pore or channel without evidence for a carrier-mediated mechanism. May be either selective (it enables passage of a specific ion only) or non-selective (it enables passage of two or more ions of same charge but different size).
biological process
	GO:0034220	ion transmembrane transport	A process in which an ion is transported from one side of a membrane to the other by means of some agent such as a transporter or pore.
	GO:0006811	ion transport	The directed movement of charged atoms or small charged molecules into, out of or within a cell, or between cells, by means of some agent such as a transporter or pore.
cellular component
	GO:0016021	integral component of membrane	The component of a membrane consisting of the gene products and protein complexes having at least some part of their peptide sequence embedded in the hydrophobic region of the membrane.
	GO:0016020	membrane	A lipid bilayer along with all the proteins and protein complexes embedded in it an attached to it.

Asymmetric/Biological Unit
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	2zxe
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	Q4H132_SQUAC \| Q4H132
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1wpg	SR CA2+-ATPASE IN THE E2.MGF42-(TG) FORM

Description

Compounds

Structural Features

Chains, Units

Ligands, Modified Residues, Ions (6, 9)

Sites (9, 9)

SS Bonds (3, 3)

Cis Peptide Bonds (2, 2)

Sequence-Structure Mapping

SAPs(SNPs)/Variants (0, 0)

PROSITE Motifs (0, 0)

Exons (0, 0)

Sequences/Alignments

Classification and Annotation

SCOP Domains (0, 0)

CATH Domains (6, 6)

Pfam Domains (5, 5)

Gene Ontology (16, 25)

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Databases

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Related Entries

Entries Sharing at Least One Protein Chain (UniProt ID)

Related Entries Specified in the PDB File