Hydrogen (gas) (PAMDB000355)

IdentificationTaxonomyPhysical PropertiesBiological PropertiesSpectraConcentrationsLinksReferencesEnzymes Transporters
Proteins (3280)
Record Information
Version 1.0
Update Date 1/22/2018 11:54:54 AM
Metabolite IDPAMDB000355
Identification
Name: Hydrogen (gas)
Description:Hydrogen is a colorless, odorless, nonmetallic, tasteless, highly flammable diatomic gas with the molecular formula H2. With an atomic weight of 1.00794, hydrogen is the lightest element. Besides the common H1 isotope, hydrogen exists as the stable isotope Deuterium and the unstable, radioactive isotope Tritium. Hydrogen is the most abundant of the chemical elements, constituting roughly 75% of the universe's elemental mass. Hydrogen can form compounds with most elements and is present in water and most organic compounds. It plays a particularly important role in acid-base chemistry, in which many reactions involve the exchange of protons between soluble molecules. Oxidation of hydrogen, in the sense of removing its electron, formally gives H+, containing no electrons and a nucleus which is usually composed of one proton. That is why H+ is often called a proton. This species is central to discussion of acids. Under the Bronsted-Lowry theory, acids are proton donors, while bases are proton acceptors. The transport of protons or hydrogen ions across the membrane(ie the creation of a proton gradient) is critical to the generation of energy (ATP) for all living cells.
Structure
Thumb
🔍MOLSDFPDBSMILESInChIView Structure
Synonyms:
  • Dihydrogen
  • Hydrogen
  • Hydrogen cation
  • Hydrogen gas
  • Hydrogen ion
  • Hydrogen molecule
  • Hydronium
  • Proton
Chemical Formula: H2
Average Molecular Weight: 2.0159
Monoisotopic Molecular Weight: 2.015650064
InChI Key: UFHFLCQGNIYNRP-UHFFFAOYSA-N
InChI:InChI=1S/H2/h1H
CAS number: 1333-74-0
IUPAC Name:Not Available
Traditional IUPAC Name: Not Available
SMILES:[H][H]
Chemical Taxonomy
Taxonomy DescriptionThis compound belongs to the class of inorganic compounds known as other non-metal hydrides. These are inorganic compounds in which the heaviest atom bonded to a hydrogen atom is belongs to the class of 'other non-metals'.
Kingdom Inorganic compounds
Super ClassHomogeneous non-metal compounds
Class Other non-metal organides
Sub ClassOther non-metal hydrides
Direct Parent Other non-metal hydrides
Alternative Parents Not Available
Substituents
  • Other non-metal hydride
  • Acyclic compound
Molecular Framework Acyclic compounds
External Descriptors
Physical Properties
State: Liquid
Charge:0
Melting point: -259.2 °C
Experimental Properties:
PropertyValueSource
Water Solubility:0.00162 mg/mL at 21 oC [VENABLE,CS & FUWA,T (1922)]PhysProp
Predicted Properties
PropertyValueSource
Physiological Charge0ChemAxon
Hydrogen Acceptor Count0ChemAxon
Hydrogen Donor Count0ChemAxon
Polar Surface Area0 Å2ChemAxon
Rotatable Bond Count0ChemAxon
Refractivity0 m3·mol-1ChemAxon
Polarizability0.74 Å3ChemAxon
Number of Rings0ChemAxon
Bioavailability1ChemAxon
Rule of FiveYesChemAxon
Ghose FilterYesChemAxon
Veber's RuleYesChemAxon
MDDR-like RuleYesChemAxon
Biological Properties
Cellular Locations: Cytoplasm
Reactions:
2 Hydrogen ion + Hydrogen (gas) + Ubiquinone-8 > Ubiquinol-8 +2 Hydrogen ion
2-Demethylmenaquinone 8 + 2 Hydrogen ion + Hydrogen (gas) > 2-Demethylmenaquinol 8 +2 Hydrogen ion
2 Hydrogen ion + Hydrogen (gas) + Menaquinone 8 > Menaquinol 8 +2 Hydrogen ion
Formic acid + Hydrogen ion > Carbon dioxide + Hydrogen (gas)
Water + Phosphonate > Hydrogen (gas) + Phosphate
Hydrogen ion > Hydrogen (gas)
a menaquinone + Hydrogen ion + Hydrogen (gas) > a menaquinol + Hydrogen ion
Hydrogen (gas) + A > AH(2)
Hydrogen (gas) + Acceptor <> Reduced acceptor
Pathways:
Spectra
Spectra:
Spectrum TypeDescriptionSplash Key
Predicted LC-MS/MSPredicted LC-MS/MS Spectrum - 10V, Positivesplash10-0udi-9000000000-0595c445077141efd7acView in MoNA
Predicted LC-MS/MSPredicted LC-MS/MS Spectrum - 20V, Positivesplash10-0udi-9000000000-0595c445077141efd7acView in MoNA
Predicted LC-MS/MSPredicted LC-MS/MS Spectrum - 40V, Positivesplash10-0udi-9000000000-0595c445077141efd7acView in MoNA
Predicted LC-MS/MSPredicted LC-MS/MS Spectrum - 10V, Negativesplash10-0udi-9000000000-cbcf030cfea82ec88da3View in MoNA
Predicted LC-MS/MSPredicted LC-MS/MS Spectrum - 20V, Negativesplash10-0udi-9000000000-cbcf030cfea82ec88da3View in MoNA
Predicted LC-MS/MSPredicted LC-MS/MS Spectrum - 40V, Negativesplash10-0udi-9000000000-cbcf030cfea82ec88da3View in MoNA
References
References:
  • Kanehisa, M., Goto, S., Sato, Y., Furumichi, M., Tanabe, M. (2012). "KEGG for integration and interpretation of large-scale molecular data sets." Nucleic Acids Res 40:D109-D114. Pubmed: 22080510
  • Keseler, I. M., Collado-Vides, J., Santos-Zavaleta, A., Peralta-Gil, M., Gama-Castro, S., Muniz-Rascado, L., Bonavides-Martinez, C., Paley, S., Krummenacker, M., Altman, T., Kaipa, P., Spaulding, A., Pacheco, J., Latendresse, M., Fulcher, C., Sarker, M., Shearer, A. G., Mackie, A., Paulsen, I., Gunsalus, R. P., Karp, P. D. (2011). "EcoCyc: a comprehensive database of Escherichia coli biology." Nucleic Acids Res 39:D583-D590. Pubmed: 21097882
Synthesis Reference: Ait-Ichou, I.; Formenti, M.; Pommier, B.; Teichner, S. J. Photocatalytic dehydrogenation of isopropanol on platinum/titania catalysts. Journal of Catalysis (1985), 91(2), 293-307.
Material Safety Data Sheet (MSDS) Not Available
External Links:
ResourceLink
CHEBI ID29235
HMDB IDHMDB01362
Pubchem Compound ID5362549
Kegg IDC00282
ChemSpider ID4515072
WikipediaHydrogen
BioCyc IDHYDROGEN-MOLECULE
EcoCyc IDHYDROGEN-MOLECULE

Enzymes

Protein Details
• Alkaline phosphatase
General function:
Involved in catalytic activity
Specific function:
A phosphate monoester + H(2)O = an alcohol + phosphate
Gene Name:
phoA
Locus Tag:
PA3296
Molecular weight:
50.4 kDa
Reactions
A phosphate monoester + H(2)O = an alcohol + phosphate.

Transporters