4wfh

X-ray diffraction
3.01Å resolution

Human TRAAK K+ channel in a Tl+ bound nonconductive conformation

Released:

Function and Biology Details

Reactions catalysed:
Succinyl-CoA + enzyme N(6)-(dihydrolipoyl)lysine = CoA + enzyme N(6)-(S-succinyldihydrolipoyl)lysine
1-(5-phospho-beta-D-ribosyl)-ATP + H(2)O = 1-(5-phospho-beta-D-ribosyl)-AMP + diphosphate
D-galactose + O(2) = D-galacto-hexodialdose + H(2)O(2)
Purine deoxynucleoside + phosphate = purine + 2'-deoxy-alpha-D-ribose 1-phosphate
(8S)-3',8-cyclo-7,8-dihydroguanosine 5'-triphosphate = cyclic pyranopterin phosphate + diphosphate
D-arabinose 5-phosphate = D-ribulose 5-phosphate
ATP + a protein = ADP + a phosphoprotein
N-(5-phospho-D-ribosyl)-anthranilate + diphosphate = anthranilate + 5-phospho-alpha-D-ribose 1-diphosphate
S-adenosyl-L-methionine + phospholipid olefinic fatty acid = S-adenosyl-L-homocysteine + phospholipid cyclopropane fatty acid
UDP-N-acetyl-alpha-D-glucosamine = UDP-2-acetamido-2,6-dideoxy-alpha-D-xylo-hex-4-ulose + H(2)O
ATP-dependent breakage, passage and rejoining of double-stranded DNA
Naphthalene + NADH + O(2) = (1R,2S)-1,2-dihydronaphthalene-1,2-diol + NAD(+)
2 alpha,alpha'-trehalose 6-mycolate = alpha,alpha'-trehalose + alpha,alpha'-trehalose 6,6'-bismycolate
Release of N-terminal proline from a peptide.
D-ribose 5-phosphate = D-ribulose 5-phosphate
Release of an N-terminal amino acid, Xaa-|-Yaa-, in which Xaa is preferably Leu, but may be other amino acids including Pro although not Arg or Lys, and Yaa may be Pro. Amino acid amides and methyl esters are also readily hydrolyzed, but rates on arylamides are exceedingly low.
(1a) (2R,3S)-3-isopropylmalate = 2-isopropylmaleate + H(2)O
Isochorismate + H(2)O = (2S,3S)-2,3-dihydroxy-2,3-dihydrobenzoate + pyruvate
3-(5-oxo-4,5-dihydro-3H-imidazol-4-yl)propanoate = urocanate + H(2)O
A phosphate monoester + H(2)O = an alcohol + phosphate
O-phospho-L(or D)-serine + H(2)O = L(or D)-serine + phosphate
Cleavage of peptide bonds with very broad specificity.
Selective cleavage of Gln-|-Gly bond in the poliovirus polyprotein. In other picornavirus reactions Glu may be substituted for Gln, and Ser or Thr for Gly.
2 6,7-dimethyl-8-(1-D-ribityl)lumazine = riboflavin + 4-(1-D-ribitylamino)-5-amino-2,6-dihydroxypyrimidine
Diphosphate + H(2)O = 2 phosphate
4 Fe(2+) + 4 H(+) + O(2) = 4 Fe(3+) + 2 H(2)O
3'-end directed exonucleolytic cleavage of viral RNA-DNA hybrid
4 benzenediol + O(2) = 4 benzosemiquinone + 2 H(2)O
(R)-mandelonitrile = cyanide + benzaldehyde
Chorismate = prephenate
L-asparagine + H(2)O = L-aspartate + NH(3)
Triacylglycerol + H(2)O = diacylglycerol + a carboxylate
A carboxylic ester + H(2)O = an alcohol + a carboxylate
Selective hydrolysis of -Xaa-Xaa-|-Yaa- bonds in which each of the Xaa can be either Arg or Lys and Yaa can be either Ser or Ala.
S-ubiquitinyl-[E2 ubiquitin-conjugating enzyme]-L-cysteine + [acceptor protein]-L-lysine = [E2 ubiquitin-conjugating enzyme]-L-cysteine + N(6)-ubiquitinyl-[acceptor protein]-L-lysine
ATP + adenylyl sulfate = ADP + 3'-phosphoadenylyl sulfate
Hydrolysis of alpha-(2->3)-, alpha-(2->6)-, alpha-(2->8)- glycosidic linkages of terminal sialic acid residues in oligosaccharides, glycoproteins, glycolipids, colominic acid and synthetic substrates.
Preferential cleavage: hydrophobic, preferably aromatic, residues in P1 and P1' positions. Cleaves 1-Phe-|-Val-2, 4-Gln-|-His-5, 13-Glu-|-Ala-14, 14-Ala-|-Leu-15, 15-Leu-|-Tyr-16, 16-Tyr-|-Leu-17, 23-Gly-|-Phe-24, 24-Phe-|-Phe-25 and 25-Phe-|-Tyr-26 bonds in the B chain of insulin.
ATP + phenylacetate + CoA = AMP + diphosphate + phenylacetyl-CoA
Random endo-hydrolysis of N-acetyl-beta-D-glucosaminide (1->4)-beta-linkages in chitin and chitodextrins
2 glutathione + ROOH = glutathione disulfide + H(2)O + ROH
Cyclo(L-tyrosyl-L-tyrosyl) + 2 reduced ferredoxin [iron-sulfur] cluster + 2 H(+) + O(2) = mycocyclosin + 2 oxidized ferredoxin [iron-sulfur] cluster + 2 H(2)O
Nitric oxide + H(2)O + ferricytochrome c = nitrite + ferrocytochrome c + 2 H(+)
dCTP + 2 H(2)O = dUMP + diphosphate + NH(3)
ATP + shikimate = ADP + shikimate 3-phosphate
TSAVLQ-|-SGFRK-NH(2) and SGVTFQ-|-GKFKK the two peptides corresponding to the two self-cleavage sites of the SARS 3C-like proteinase are the two most reactive peptide substrates. The enzyme exhibits a strong preference for substrates containing Gln at P1 position and Leu at P2 position.
Endopeptidase with a preference for cleavage when the P1 position is occupied by Glu-|- and the P1' position is occupied by Gly-|-
(R)-10-hydroxystearate = oleate + H(2)O
Mycoredoxin + ROOH = mycoredoxin disulfide + H(2)O + ROH
Formyl-L-methionyl peptide + H(2)O = formate + methionyl peptide
Hydrolysis of (1->4)-beta-D-glucosidic linkages in cellulose and cellotetraose, releasing cellobiose from the non-reducing ends of the chains
(S)-dihydroorotate + fumarate = orotate + succinate
5-methyltetrahydrofolate + L-homocysteine = tetrahydrofolate + L-methionine
An acyl-[acyl-carrier protein] + NAD(+) = a trans-2,3-dehydroacyl-[acyl-carrier protein] + NADH
ATP + tetrahydropteroyl-(gamma-Glu)(n) + L-glutamate = ADP + phosphate + tetrahydropteroyl-(gamma-Glu)(n+1)
Isochorismate = salicylate + pyruvate
Prephenate = phenylpyruvate + H(2)O + CO(2)
ATP + 7,8-dihydropteroate + L-glutamate = ADP + phosphate + 7,8-dihydropteroylglutamate
Hydrolysis of (1->4)-alpha-D-glucosidic linkage in 4-alpha-D-((1->4)-alpha-D-glucanosyl)(n) trehalose to yield trehalose and (1->4)-alpha-D-glucan
NTP + H(2)O = NDP + phosphate
Succinate semialdehyde + NADP(+) + H(2)O = succinate + NADPH
Trans,octacis-decaprenylphospho-beta-D-ribofuranose + FAD = trans,octacis-decaprenylphospho-beta-D-erythro-pentofuranosid-2-ulose + FADH(2)
ATP + L-glutamate + NH(3) = ADP + phosphate + L-glutamine
5-carboxyamino-1-(5-phospho-D-ribosyl)imidazole = 5-amino-1-(5-phospho-D-ribosyl)imidazole-4-carboxylate
L-leucine + 2-oxoglutarate = 4-methyl-2-oxopentanoate + L-glutamate
5,10-methylenetetrahydrofolate + glycine + H(2)O = tetrahydrofolate + L-serine
ATP + 2-(formamido)-N(1)-(5-phospho-D-ribosyl)acetamidine = ADP + phosphate + 5-amino-1-(5-phospho-D-ribosyl)imidazole
ATP + UMP = ADP + UDP
Endohydrolysis of RNA in RNA/DNA hybrids. Three different cleavage modes: 1. sequence-specific internal cleavage of RNA. Human immunodeficiency virus type 1 and Moloney murine leukemia virus enzymes prefer to cleave the RNA strand one nucleotide away from the RNA-DNA junction. 2. RNA 5'-end directed cleavage 13-19 nucleotides from the RNA end. 3. DNA 3'-end directed cleavage 15-20 nucleotides away from the primer terminus.
Isocitrate = succinate + glyoxylate
A beta-lactam + H(2)O = a substituted beta-amino acid
3-deoxy-D-manno-octulosonate 8-phosphate + H(2)O = 3-deoxy-D-manno-octulosonate + phosphate
5,10-methylenetetrahydrofolate + dUMP = dihydrofolate + dTMP
L-arginine + H(2)O = L-ornithine + urea
D-glyceraldehyde 3-phosphate = glycerone phosphate
(1a) 2 cob(II)alamin + 2 [corrinoid adenosyltransferase] = 2 [corrinoid adenosyltransferase]-cob(II)alamin
6-hydroxymethyl-7,8-dihydropterin diphosphate + 4-aminobenzoate = diphosphate + dihydropteroate
D-xylopyranose = D-xylulose
Cleaves -Ala-|-Ser- and -Ala-|-Ala- bonds in the scaffold protein.
Hydrolysis of proteins to small peptides in the presence of ATP and magnesium. Alpha-Casein is the usual test substrate. In the absence of ATP, only oligopeptides shorter than five residues are hydrolyzed (such as succinyl-Leu-Tyr-|-NHMec; and Leu-Tyr-Leu-|-Tyr-Trp, in which cleavage of the -Tyr-|-Leu- and -Tyr-|-Trp bonds also occurs).
Autocatalytic release of the core protein from the N-terminus of the togavirus structural polyprotein by hydrolysis of a -Trp-|-Ser- bond.
D-fructose 1,6-bisphosphate = glycerone phosphate + D-glyceraldehyde 3-phosphate
Deoxynucleoside triphosphate + DNA(n) = diphosphate + DNA(n+1)
Hydrolysis of four peptide bonds in the viral precursor polyprotein, commonly with Asp or Glu in the P6 position, Cys or Thr in P1 and Ser or Ala in P1'.
Hydrolyzes glutaminyl bonds, and activity is further restricted by preferences for the amino acids in P6 - P1' that vary with the species of potyvirus, e.g. Glu-Xaa-Xaa-Tyr-Xaa-Gln-|-(Ser or Gly) for the enzyme from tobacco etch virus. The natural substrate is the viral polyprotein, but other proteins and oligopeptides containing the appropriate consensus sequence are also cleaved.
Hydrolyzes a Gly-|-Gly bond at its own C-terminus, commonly in the sequence -Tyr-Xaa-Val-Gly-|-Gly, in the processing of the potyviral polyprotein.
Autocatalytically cleaves itself from the polyprotein of the foot-and-mouth disease virus by hydrolysis of a Lys-|-Gly bond, but then cleaves host cell initiation factor eIF-4G at bonds -Gly-|-Arg- and -Lys-|-Arg-.
L-lysine + 2-oxoglutarate = (S)-2-amino-6-oxohexanoate + L-glutamate
Cutin + H(2)O = cutin monomers
2-iminobutanoate + H(2)O = 2-oxobutanoate + NH(3)
Choline = trimethylamine + acetaldehyde
2 bilirubin + O(2) = 2 biliverdin + 2 H(2)O
S-adenosyl-L-methionine + a 5'-(N(7)-methyl 5'-triphosphoguanosine)-(ribonucleotide)-[mRNA] = S-adenosyl-L-homocysteine + a 5'-(N(7)-methyl 5'-triphosphoguanosine)-(2'-O-methyl-ribonucleotide)-[mRNA]
L-rhamnonate = 2-dehydro-3-deoxy-L-rhamnonate + H(2)O
[a protein]-serine/threonine phosphate + H(2)O = [a protein]-serine/threonine + phosphate
(S)-3-hydroxyacyl-CoA + NAD(+) = 3-oxoacyl-CoA + NADH
ATP + (R)-pantoate + beta-alanine = AMP + diphosphate + (R)-pantothenate
(S)-malate = fumarate + H(2)O
Acetyl-CoA + [protein]-L-lysine = CoA + [protein]-N(6)-acetyl-L-lysine
H(2)CO(3) = CO(2) + H(2)O
Acetyl-CoA + H(2)O + acetoacetyl-CoA = (S)-3-hydroxy-3-methylglutaryl-CoA + CoA
S-methyl-5'-thioadenosine + phosphate = adenine + S-methyl-5-thio-alpha-D-ribose 1-phosphate
ATP + adenosine = ADP + AMP
ATP + thymidine = ADP + thymidine 5'-phosphate
Acetyl-CoA + D-glucosamine 6-phosphate = CoA + N-acetyl-D-glucosamine 6-phosphate
Thiol-dependent hydrolysis of ester, thioester, amide, peptide and isopeptide bonds formed by the C-terminal Gly of ubiquitin (a 76-residue protein attached to proteins as an intracellular targeting signal).
Acetyl-CoA + H(2)O + glyoxylate = (S)-malate + CoA
Chorismate = isochorismate
Nucleoside triphosphate + RNA(n) = diphosphate + RNA(n+1)
Acyl-CoA + 1,2-diacylglycerol = CoA + triacylglycerol
ATP + dTMP = ADP + dTDP
ATP + H(2)O + H(+)(Side 1) + K(+)(Side 2) = ADP + phosphate + H(+)(Side 2) + K(+)(Side 1)
ATP + nucleoside diphosphate = ADP + nucleoside triphosphate
Acetyl-CoA + a 2-deoxystreptamine antibiotic = CoA + N(3)-acetyl-2-deoxystreptamine antibiotic
An ultra-long-chain mono-unsaturated acyl-[acyl-carrier protein] + a malonyl-[acyl-carrier protein] = an ultra-long-chain mono-unsaturated 3-oxo-fatty acyl-[acyl-carrier protein] + CO(2) + a holo-[acyl-carrier protein]
ATP + (R)-5-phosphomevalonate = ADP + (R)-5-diphosphomevalonate
ATP + AMP = 2 ADP
Hydrolysis of terminal non-reducing alpha-L-arabinofuranoside residues in alpha-L-arabinosides
ATP + protein L-histidine = ADP + protein N-phospho-L-histidine
Hydrolysis of terminal non-reducing N-acetyl-D-hexosamine residues in N-acetyl-beta-D-hexosaminides
ATP + 6-hydroxymethyl-7,8-dihydropterin = AMP + 6-hydroxymethyl-7,8-dihydropterin diphosphate
2'-deoxycytidine + H(2)O = 2'-deoxyuridine + NH(3)
Adenosine + H(2)O = inosine + NH(3)
4-(2-carboxyphenyl)-4-oxobutanoyl-CoA = 1,4-dihydroxy-2-naphthoyl-CoA + H(2)O
2-C-methyl-D-erythritol 4-phosphate + NADP(+) = 1-deoxy-D-xylulose 5-phosphate + NADPH
ATP + (R)-pantothenate = ADP + (R)-4'-phosphopantothenate
Cyclic di-3',5'-guanylate + H(2)O = 5'-phosphoguanylyl(3'->5')guanosine
Succinate + a quinone = fumarate + a quinol
GDP-beta-L-fucose + NADP(+) = GDP-4-dehydro-alpha-D-rhamnose + NADPH
(1R,6R)-6-hydroxy-2-succinylcyclohexa-2,4-diene-1-carboxylate = 2-succinylbenzoate + H(2)O
N(2)-acetyl-L-ornithine + L-glutamate = L-ornithine + N-acetyl-L-glutamate
Selective cleavage of Tyr-|-Gly bond in picornavirus polyprotein.
An aldehyde + NAD(+) + H(2)O = a carboxylate + NADH
Acetyl-CoA + L-serine = CoA + O-acetyl-L-serine
S-adenosyl-L-methionine + adenine(2030) in 23S rRNA = S-adenosyl-L-homocysteine + N(6)-methyladenine(2030) in 23S rRNA
ATP + L-tyrosine + tRNA(Tyr) = AMP + diphosphate + L-tyrosyl-tRNA(Tyr)
(3S)-3-hydroxyacyl-CoA = trans-2(or 3)-enoyl-CoA + H(2)O
Limited hydrolysis of proteins of the neuroexocytosis apparatus, synaptobrevin (also known as neuronal vesicle-associated membrane protein, VAMP), synaptosome-associated protein of 25 kDa (SNAP25) or syntaxin. No detected action on small molecule substrates.
Beta-D-ribopyranose = beta-D-ribofuranose
AMP + H(2)O = D-ribose 5-phosphate + adenine
L-homoserine + NAD(P)(+) = L-aspartate 4-semialdehyde + NAD(P)H
ATP + H(2)O + a folded polypeptide = ADP + phosphate + an unfolded polypeptide
Hydrolysis of terminal non-reducing beta-D-galactose residues in beta-D-galactosides
O-phospho-L-homoserine + H(2)O = L-threonine + phosphate
Acetyl-CoA + malonyl-[acyl-carrier-protein] = acetoacetyl-[acyl-carrier-protein] + CoA + CO(2) 
ATP + H(2)O = ADP + phosphate
L-proline + NAD(P)(+) = 1-pyrroline-5-carboxylate + NAD(P)H
5,6,7,8-tetrahydrofolate + NADP(+) = 7,8-dihydrofolate + NADPH
Tuberculosinyl diphosphate + adenosine = 1-tuberculosinyladenosine + diphosphate
2 superoxide + 2 H(+) = O(2) + H(2)O(2)
L-fuconate = 2-dehydro-3-deoxy-L-fuconate + H(2)O
CTP + 2-C-methyl-D-erythritol 4-phosphate = diphosphate + 4-(cytidine 5'-diphospho)-2-C-methyl-D-erythritol
L-histidine-[translation elongation factor 2] + S-adenosyl-L-methionine = 2-((3S)-3-amino-3-carboxypropyl)-L-histidine-[translation elongation factor 2] + S-methyl-5'-thioadenosine
Biochemical function:
Cellular component:

Structure analysis Details

Assembly composition:
hetero hexamer (preferred)
Entry contents:
3 distinct polypeptide molecules
Macromolecules (3 distinct):
Potassium channel subfamily K member 4 Chains: A, B
Molecule details ›
Chains: A, B
Length: 299 amino acids
Theoretical weight: 32.57 KDa
Source organism: Homo sapiens
Expression system: Komagataella pastoris
UniProt:
  • Canonical: Q9NYG8 (Residues: 1-264; Coverage: 67%)
  • Best match: Q9NYG8-2 (Residues: 1-290)
Gene names: KCNK4, TRAAK
Sequence domains: Ion channel
Structure domains: Helix Hairpins
ANTI-TRAAK ANTIBODY 13E9 FAB FRAGMENT LIGHT CHAIN Chains: D, F
Molecule details ›
Chains: D, F
Length: 211 amino acids
Theoretical weight: 23.04 KDa
Source organism: Mus musculus
Expression system: Mus musculus
Structure domains: Immunoglobulins
ANTI-TRAAK ANTIBODY 13E9 FAB FRAGMENT HEAVY CHAIN Chains: E, G
Molecule details ›
Chains: E, G
Length: 217 amino acids
Theoretical weight: 23.47 KDa
Source organism: Mus musculus
Expression system: Mus musculus
Structure domains: Immunoglobulins

Ligands and Environments

3 bound ligands:
No modified residues

Experiments and Validation Details

Entry percentile scores
X-ray source: APS BEAMLINE 24-ID-C
Spacegroup: P21
Unit cell:
a: 80.972Å b: 138.755Å c: 96.759Å
α: 90° β: 94.64° γ: 90°
R-values:
R R work R free
0.205 0.203 0.238
Expression systems:
  • Komagataella pastoris
  • Mus musculus