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Title :   CRYSTAL STRUCTURE OF HUMAN AQUAPORIN 4 AT 1.8 AND ITS MECHANISM OF CONDUCTANCE

Authors :   J. D. Ho, R. Yeh, A. Sandstrom, I. Chorny, W. E. C. Harries, R. A. Robbins, L. J. W. Miercke, R. M. Stroud, Center For Structures Of Membrane (Csmp)

Date :   23 Feb 09 (Deposition) - 31 Mar 09 (Release) - 13 Jul 11 (Revision)

Method :   X-RAY DIFFRACTION

Resolution :   1.80

Chains :   Asym. Unit : A
Biol. Unit 1: A  (4x)

Keywords :   Brain Edema, Aquaporin, Proton Exclusion, Structural Genomics, Psi-2, Protein Structure Initiative, Center For Structures Of Membrane Proteins, Csmp, Glycoprotein, Membrane, Phosphoprotein, Transmembrane, Transport, Membrane Protein (Keyword Search: [Gene Ontology, PubMed, Web (Google)] )

Reference :   J. D. Ho, R. Yeh, A. Sandstrom, I. Chorny, W. E. Harries, R. A. Robbins, L. J. Miercke, R. M. Stroud
Crystal Structure Of Human Aquaporin 4 At 1. 8 A And Its Mechanism Of Conductance.
Proc. Natl. Acad. Sci. Usa V. 106 7437 2009
PubMed-ID: 19383790 | Reference-DOI: 10.1073/PNAS.0902725106

Molecule 1 - AQUAPORIN-4
	Chains	:	A
	Engineered	:	YES
	Expression System	:	PICHIA PASTORIS
	Expression System Strain	:	X-33
	Expression System Taxid	:	4922
	Expression System Vector Type	:	PPICZ
	Fragment	:	HAQP4 TRYPSINIZED (RESIDUE 32-254)
	Gene	:	AQP4
	Organism Common	:	HUMAN
	Organism Scientific	:	HOMO SAPIENS
	Organism Taxid	:	9606
	Synonym	:	AQP-4, WCH4, MERCURIAL-INSENSITIVE WATER CHANNEL, MIWC

		1
Asymmetric Unit	:	A
Biological Unit 1 (4x)	:	A

Summary Information (see also Sequences/Alignments below)

Asymmetric Unit (2, 6)

No.	Name	Count	Type	Full Name
1	BOG	1	Ligand/Ion	B-OCTYLGLUCOSIDE
2	GOL	5	Ligand/Ion	GLYCEROL

Biological Unit 1 (2, 24)

No.	Name	Count	Type	Full Name
1	BOG	4	Ligand/Ion	B-OCTYLGLUCOSIDE
2	GOL	20	Ligand/Ion	GLYCEROL

Asymmetric Unit (6, 6)

No.	Name	Evidence	Residues	Description
1	AC1	SOFTWARE	HOH A:19 , THR A:56 , ILE A:57 , ASN A:58 , VAL A:141 , VAL A:142 , GLY A:143 , GLY A:144 , LEU A:145 , GLY A:146 , HOH A:260	BINDING SITE FOR RESIDUE GOL A 1
2	AC2	SOFTWARE	GOL A:6 , VAL A:147 , THR A:148 , MET A:149 , HIS A:151 , ILE A:205 , ASN A:206 , GLY A:209	BINDING SITE FOR RESIDUE GOL A 2
3	AC3	SOFTWARE	GLY A:54 , SER A:55 , ILE A:57 , TRP A:59 , MET A:70 , LEU A:202 , PHE A:203 , ILE A:205 , ASN A:206	BINDING SITE FOR RESIDUE GOL A 3
4	AC4	SOFTWARE	HOH A:10 , VAL A:85 , ARG A:182 , ASP A:184 , THR A:186 , ILE A:189 , ALA A:190	BINDING SITE FOR RESIDUE GOL A 4
5	AC5	SOFTWARE	GOL A:2 , GLY A:146 , VAL A:147 , GLY A:209 , ARG A:216	BINDING SITE FOR RESIDUE GOL A 6
6	AC6	SOFTWARE	GLY A:152 , ALA A:156 , TRP A:227 , GLU A:228 , ASN A:229 , TRP A:231	BINDING SITE FOR RESIDUE BOG A 473

(no "SS Bond" information available for 3GD8)

(no "Cis Peptide Bond" information available for 3GD8)

(no "SAP(SNP)/Variant" information available for 3GD8)

Asymmetric Unit (1, 1)

	PROSITE			UniProtKB		PDB
No.	ID	AC	Description	ID	Location	Count	Location
1	MIP	PS00221	MIP family signature.	AQP4_HUMAN	95-103	1	A:95-103

Biological Unit 1 (1, 4)

	PROSITE			UniProtKB		PDB
No.	ID	AC	Description	ID	Location	Count	Location
1	MIP	PS00221	MIP family signature.	AQP4_HUMAN	95-103	4	A:95-103

(no "Exon" information available for 3GD8)

Asymmetric 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
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Chain A from PDB  Type:PROTEIN  Length:223
 aligned with AQP4_HUMAN | P55087 from UniProtKB/Swiss-Prot  Length:323

    Alignment length:223
                                    41        51        61        71        81        91       101       111       121       131       141       151       161       171       181       191       201       211       221       231       241       251   
           AQP4_HUMAN    32 QAFWKAVTAEFLAMLIFVLLSLGSTINWGGTEKPLPVDMVLISLCFGLSIATMVQCFGHISGGHINPAVTVAMVCTRKISIAKSVFYIAAQCLGAIIGAGILYLVTPPSVVGGLGVTMVHGNLTAGHGLLVELIITFQLVFTIFASCDSKRTDVTGSIALAIGFSVAIGHLFAINYTGASMNPARSFGPAVIMGNWENHWIYWVGPIIGAVLAGGLYEYVFCP 254
               SCOP domains d3gd8a_ A: automated matches                                                                                                                                                                                                    SCOP domains
               CATH domains 3gd8A00 A:32-254 Glycerol uptake facilitator protein.                                                                                                                                                                           CATH domains
               Pfam domains ------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------- Pfam domains
         Sec.struct. author hhhhhhhhhhhhhhhhhhhhhhhhh............hhhhhhhhhhhhhhhhhhhhhhhhh...hhhhhhhhhhh...hhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhh...........hhhhhhhhhhhhhhhhhhhhhhhh.........hhhhhhhhhhhhhhhhhhhhhh...hhhhhhhhhhhhh.....hhhhhhhhhhhhhhhhhhhhh... Sec.struct. author
                 SAPs(SNPs) ------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------- SAPs(SNPs)
                    PROSITE ---------------------------------------------------------------MIP      ------------------------------------------------------------------------------------------------------------------------------------------------------- PROSITE
                 Transcript ------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------- Transcript
                 3gd8 A  32 QAFWKAVTAEFLAMLIFVLLSLGSTINWGGTEKPLPVDMVLISLCFGLSIATMVQCFGHISGGHINPAVTVAMVCTRKISIAKSVFYIAAQCLGAIIGAGILYLVTPPSVVGGLGVTMVHGNLTAGHGLLVELIITFQLVFTIFASCDSKRTDVTGSIALAIGFSVAIGHLFAINYTGASMNPARSFGPAVIMGNWENHWIYWVGPIIGAVLAGGLYEYVFCP 254
                                    41        51        61        71        81        91       101       111       121       131       141       151       161       171       181       191       201       211       221       231       241       251

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 '\|'

Asymmetric Unit

Classes(

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Folds(

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Superfamilies( (-)

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Families(

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Protein Domains( (-)

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Organisms( (-)

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Class: Membrane and cell surface proteins and peptides (2046)

Fold: Aquaporin-like (34)

Superfamily: Aquaporin-like (34)

Family: automated matches (12)

Protein domain: automated matches (12)

Human (Homo sapiens) [TaxId: 9606] (2)

d3gd8a_

Asymmetric Unit

Classes(

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Architectures( (-)

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Topologies( (-)

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Homologous Superfamilies( (-)

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Organisms( (-)

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Class: Mainly Alpha (13335)

Architecture: Up-down Bundle (3216)

Topology: Glycerol uptake facilitator protein (37)

Homologous Superfamily: Glycerol uptake facilitator protein. (37)

Human (Homo sapiens) (5)

3gd8A00

A:32-254

(no "Pfam Domain" information available for 3GD8)

Asymmetric Unit(hide GO term definitions)

Chain A (AQP4_HUMAN | P55087)

molecular function
	GO:0015254	glycerol channel activity	Enables the facilitated diffusion of glycerol (by an energy-independent process) involving passage through a transmembrane aqueous pore or channel without evidence for a carrier-mediated mechanism.
	GO:0005215	transporter activity	Enables the directed movement of substances (such as macromolecules, small molecules, ions) into, out of or within a cell, or between cells.
	GO:0015250	water channel activity	Transport systems of this type enable facilitated diffusion of water (by an energy-independent process) by passage through a transmembrane aqueous pore or channel without evidence for a carrier-mediated mechanism.
	GO:0005372	water transmembrane transporter activity	Enables the directed movement of water (H2O) from one side of a membrane to the other.
biological process
	GO:0071346	cellular response to interferon-gamma	Any process that results in a change in state or activity of a cell (in terms of movement, secretion, enzyme production, gene expression, etc.) as a result of an interferon-gamma stimulus. Interferon gamma is the only member of the type II interferon found so far.
	GO:0009992	cellular water homeostasis	Any process involved in the maintenance of an internal steady state of water within a cell.
	GO:0015793	glycerol transport	The directed movement of glycerol into, out of or within a cell, or between cells, by means of some agent such as a transporter or pore. Glycerol is 1,2,3-propanetriol, a sweet, hygroscopic, viscous liquid, widely distributed in nature as a constituent of many lipids.
	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:0050891	multicellular organismal water homeostasis	Any process involved in the maintenance of an internal steady state of water within a tissue, organ, or a multicellular organism.
	GO:0003091	renal water homeostasis	Renal process involved in the maintenance of an internal steady state of water in the body.
	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.
	GO:0006833	water transport	The directed movement of water (H2O) into, out of or within a cell, or between cells, by means of some agent such as a transporter or pore.
cellular component
	GO:0016323	basolateral plasma membrane	The region of the plasma membrane that includes the basal end and sides of the cell. Often used in reference to animal polarized epithelial membranes, where the basal membrane is the part attached to the extracellular matrix, or in plant cells, where the basal membrane is defined with respect to the zygotic axis.
	GO:0005737	cytoplasm	All of the contents of a cell excluding the plasma membrane and nucleus, but including other subcellular structures.
	GO:0009897	external side of plasma membrane	The leaflet of the plasma membrane that faces away from the cytoplasm and any proteins embedded or anchored in it or attached to its surface.
	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:0005887	integral component of plasma membrane	The component of the plasma 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:0005886	plasma membrane	The membrane surrounding a cell that separates the cell from its external environment. It consists of a phospholipid bilayer and associated proteins.

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