Record Information
Version 1.0
Update Date 1/22/2018 11:54:54 AM
Metabolite IDPAMDB001752
Identification
Name: Selenite
Description:The selenite anion is a selenium oxoanion with the chemical formula SeO32−. A selenite (compound) is a compound that contains this ion. In slightly acid conditions, the hydrogenselenite ion, HSeO3−, is formed; in more acidic conditions selenous acid, H2SeO3, exists. Most selenite salts can be formed by heating the relevant metal oxide with selenium dioxide, e.g.:Na2O + SeO2 → Na2SeO3. Selenite is an inorganic form of selenium which may also be useful in cancer chemotherapy.(Wikipedia)
Structure
Thumb
Synonyms:
  • Selenit
  • Selenite
  • Selenite (SeO32-)
  • Selenite ion (SeO32-)
  • Selenite ion(2-)
  • Selenite(2-)
  • Trioxidoselenate(2)
  • Trioxidoselenic acid(2)
  • Trioxoselenate(2)
  • Trioxoselenate(4)
  • Trioxoselenic acid(2)
  • Trioxoselenic acid(4)
  • [SeO3]2
Chemical Formula: O3Se
Average Molecular Weight: 126.96
Monoisotopic Molecular Weight: 127.901265694
InChI Key: MCAHWIHFGHIESP-UHFFFAOYSA-L
InChI:InChI=1S/H2O3Se/c1-4(2)3/h(H2,1,2,3)/p-2
CAS number: 14124-67-5
IUPAC Name:selenite
Traditional IUPAC Name: selenite
SMILES:[O-][Se]([O-])=O
Chemical Taxonomy
Taxonomy DescriptionThis compound belongs to the class of inorganic compounds known as non-metal selenites. These are inorganic non-metallic compoundscontaining a selenite as its largest oxoanion.
Kingdom Inorganic compounds
Super ClassMixed metal/non-metal compounds
Class Other mixed metal/non-metal oxoanionic compounds
Sub ClassNon-metal selenites
Direct Parent Non-metal selenites
Alternative Parents
Substituents
  • Non-metal selenite
  • Inorganic oxide
  • Acyclic compound
Molecular Framework Acyclic compounds
External Descriptors
Physical Properties
State: Solid
Charge:0
Melting point: Not Available
Experimental Properties:
PropertyValueSource
Predicted Properties
PropertyValueSource
logP-1.3ChemAxon
pKa (Strongest Acidic)11.93ChemAxon
Physiological Charge0ChemAxon
Hydrogen Acceptor Count3ChemAxon
Hydrogen Donor Count0ChemAxon
Polar Surface Area63.19 Å2ChemAxon
Rotatable Bond Count0ChemAxon
Refractivity17.44 m3·mol-1ChemAxon
Polarizability5.32 Å3ChemAxon
Number of Rings0ChemAxon
Bioavailability1ChemAxon
Rule of FiveYesChemAxon
Ghose FilterYesChemAxon
Veber's RuleYesChemAxon
MDDR-like RuleYesChemAxon
Biological Properties
Cellular Locations: Cytoplasm
Reactions:
Pathways:
Spectra
Spectra:
Spectrum TypeDescriptionSplash Key
Predicted LC-MS/MSPredicted LC-MS/MS Spectrum - 10V, Positivesplash10-004i-0900000000-206e2169644d7a72ebc3View in MoNA
Predicted LC-MS/MSPredicted LC-MS/MS Spectrum - 20V, Positivesplash10-004i-0900000000-d61f18b74043ba2313ecView in MoNA
Predicted LC-MS/MSPredicted LC-MS/MS Spectrum - 40V, Positivesplash10-004i-1900000000-561f98a527c3e0bc3e1fView in MoNA
Predicted LC-MS/MSPredicted LC-MS/MS Spectrum - 10V, Negativesplash10-03fr-0900000000-19b9b0ba04824c6d66e8View in MoNA
Predicted LC-MS/MSPredicted LC-MS/MS Spectrum - 20V, Negativesplash10-00or-7900000000-4008d5de74977ac69eb0View in MoNA
Predicted LC-MS/MSPredicted LC-MS/MS Spectrum - 40V, Negativesplash10-004i-0900000000-749fc02d227e55ee2c3dView in MoNA
References
References: Not Available
Synthesis Reference: Not Available
Material Safety Data Sheet (MSDS) Not Available
External Links:
ResourceLink
CHEBI ID18212
HMDB IDHMDB11119
Pubchem Compound ID1090
Kegg IDC05684
ChemSpider ID1059
WikipediaSelenite_(ion)
BioCyc IDSELENITE
EcoCyc IDSELENITE

Enzymes

General function:
Involved in oxidoreductase activity
Specific function:
The nitrate reductase enzyme complex allows Pseudomonas aeruginosa to use nitrate as an electron acceptor during anaerobic growth. The alpha chain is the actual site of nitrate reduction
Gene Name:
narG
Locus Tag:
PA3875
Molecular weight:
141 kDa
Reactions
Nitrite + acceptor = nitrate + reduced acceptor.
General function:
Involved in oxidation-reduction process
Specific function:
Thioredoxin + NADP(+) = thioredoxin disulfide + NADPH
Gene Name:
trxB
Locus Tag:
PA2616
Molecular weight:
33.8 kDa
Reactions
Thioredoxin + NADP(+) = thioredoxin disulfide + NADPH.
General function:
Involved in iron-sulfur cluster binding
Specific function:
The nitrate reductase enzyme complex allows Pseudomonas aeruginosa to use nitrate as an electron acceptor during anaerobic growth. The beta chain is an electron transfer unit containing four cysteine clusters involved in the formation of iron-sulfur centers. Electrons are transferred from the gamma chain to the molybdenum cofactor of the alpha subunit
Gene Name:
narH
Locus Tag:
PA3874
Molecular weight:
58.1 kDa
Reactions
Nitrite + acceptor = nitrate + reduced acceptor.
General function:
Involved in nitrate reductase activity
Specific function:
The nitrate reductase enzyme complex allows Pseudomonas aeruginosa to use nitrate as an electron acceptor during anaerobic growth. The gamma chain is a membrane-embedded heme-iron unit resembling cytochrome b, which transfers electrons from quinones to the beta subunit
Gene Name:
narI
Locus Tag:
PA3872
Molecular weight:
25 kDa
Reactions
Nitrite + acceptor = nitrate + reduced acceptor.
General function:
Involved in nucleotide binding
Specific function:
Part of the ABC transporter complex cysAWTP involved in sulfate/thiosulfate import. Responsible for energy coupling to the transport system
Gene Name:
cysA
Locus Tag:
PA0280
Molecular weight:
36.8 kDa
Reactions
ATP + H(2)O + sulfate(Out) = ADP + phosphate + sulfate(In).
General function:
Involved in oxidoreductase activity
Specific function:
Catalytic subunit of the periplasmic nitrate reductase (NAP). Only expressed at high levels during aerobic growth. NapAB complex receives electrons from the membrane-anchored tetraheme protein napC, thus allowing electron flow between membrane and periplasm. Essential function for nitrate assimilation and may have a role in anaerobic metabolism
Gene Name:
napA
Locus Tag:
PA1174
Molecular weight:
92.9 kDa
Reactions
Nitrite + acceptor = nitrate + reduced acceptor.
General function:
Involved in transporter activity
Specific function:
Part of the ABC transporter complex cysAWTP (TC 3.A.1.6.1) involved in sulfate/thiosulfate import. Probably responsible for the translocation of the substrate across the membrane
Gene Name:
cysW
Locus Tag:
PA0281
Molecular weight:
31.3 kDa
General function:
Involved in transporter activity
Specific function:
Part of the ABC transporter complex cysAWTP (TC 3.A.1.6.1) involved in sulfate/thiosulfate import. This protein specifically binds thiosulfate and is involved in its transmembrane transport
Gene Name:
cysP
Locus Tag:
PA1493
Molecular weight:
36.5 kDa
General function:
Energy production and conversion
Specific function:
Small subunit of the periplasmic nitrate reductase (NAP). Only expressed at high levels during aerobic growth. NapAB complex receives electrons from the membrane-anchored tetraheme napC protein, thus allowing electron flow between membrane and periplasm. Essential function for nitrate assimilation and may have a role in anaerobic metabolism
Gene Name:
napB
Locus Tag:
PA1173
Molecular weight:
17.9 kDa
General function:
Involved in unfolded protein binding
Specific function:
Chaperone required for proper molybdenum cofactor insertion and final assembly of the membrane-bound respiratory nitrate reductase 1. Required for the insertion of the molybdenum into the apo-NarG subunit, maybe by keeping NarG in an appropriate competent-open conformation for the molybdenum cofactor insertion to occur. NarJ maintains the apoNarGH complex in a soluble state. Upon insertion of the molybdenum cofactor, NarJ seems to dissociate from the activated soluble NarGH complex, before its association with the NarI subunit on the membrane
Gene Name:
narJ
Locus Tag:
PA3873
Molecular weight:
27.3 kDa

Transporters

General function:
Involved in nucleotide binding
Specific function:
Part of the ABC transporter complex cysAWTP involved in sulfate/thiosulfate import. Responsible for energy coupling to the transport system
Gene Name:
cysA
Locus Tag:
PA0280
Molecular weight:
36.8 kDa
Reactions
ATP + H(2)O + sulfate(Out) = ADP + phosphate + sulfate(In).
General function:
Involved in transporter activity
Specific function:
Part of the ABC transporter complex cysAWTP (TC 3.A.1.6.1) involved in sulfate/thiosulfate import. Probably responsible for the translocation of the substrate across the membrane
Gene Name:
cysW
Locus Tag:
PA0281
Molecular weight:
31.3 kDa
General function:
Involved in transporter activity
Specific function:
Part of the ABC transporter complex cysAWTP (TC 3.A.1.6.1) involved in sulfate/thiosulfate import. This protein specifically binds thiosulfate and is involved in its transmembrane transport
Gene Name:
cysP
Locus Tag:
PA1493
Molecular weight:
36.5 kDa