1.02011-09-21 01:45:54 UTC2018-05-28 18:38:17 UTCFDB028842ArsenateThe arsenate ion is AsO43−. An arsenate (compound) is any compound that contains this ion.The arsenic atom in arsenate has a valency of 5 and is also known as pentavalent arsenic or As[V].Arsenate resembles phosphate in many respects, since arsenic and phosphorus occur in the same group (column) of the periodic table.
In acidic conditions arsenate exists as arsenic acid, H3AsO4;in weakly acid conditions it exists as dihydrogen arsenate ion, H2AsO4−; in weakly basic conditions it exists as hydrogen arsenate ion HAsO42−; and finally, in basic conditions, it exists as the arsenate ion AsO43−.
Arsenate can replace inorganic phosphate in the step of glycolysis that produces 1,3-bisphosphoglycerate, yielding 1-arseno-3-phosphoglycerate instead. This molecule is unstable and quickly hydrolyzes, forming the next intermediate in the pathway, 3-phosphoglycerate. Therefore glycolysis proceeds, but the ATP molecule that would be generated from 1,3-bisphosphoglycerate is lost - arsenate is an uncoupler of glycolysis, explaining its toxicity.[1]
Some species of bacteria obtain their energy by oxidizing various fuels while reducing arsenates to form arsenites. The enzymes involved are known as arsenate reductases.
In 2008, bacteria were discovered that employ a version of photosynthesis with arsenites as electron donors, producing arsenates (just like ordinary photosynthesis uses water as electron donor, producing molecular oxygen). The researchers conjectured that historically these photosynthesizing organisms produced the arsenates that allowed the arsenate-reducing bacteria to thrive.
(from wiki) [HMDB][AsO(OH)3]ArsateArsenate ionArsenate ionsarsenate(3-)Arsenic acidArsic acidArsorateArsoric acidARTH3AsO4OrthoarsenateOrthoarsenic acidtetraoxidoarsenate(3-)tetraoxoarsenate(3-)Tetraoxoarsenate(v)AsH3O4141.943141.924730001arsoric acidarsenic acid15584-04-0O[As](O)(O)=OInChI=1S/AsH3O4/c2-1(3,4)5/h(H3,2,3,4,5)DJHGAFSJWGLOIV-UHFFFAOYSA-N belongs to the class of inorganic compounds known as miscellaneous arsenates. These are inorganic compounds in which the largest metallic oxoanion is arsenate, to which either no atom or a non metal atom is bonded.Miscellaneous arsenatesInorganic compoundsMixed metal/non-metal compoundsMiscellaneous mixed metal/non-metalsMiscellaneous metallic oxoanionic compoundsInorganic arsenic compoundsInorganic oxidesInorganic saltsMetalloid saltsArsenateInorganic arsenic compoundInorganic metalloid saltInorganic oxideInorganic saltarsenic oxoacidSolidlogp-1.2pka_strongest_acidic3.15iupacarsoric acidaverage_mass141.943mono_mass141.924730001smilesO[As](O)(O)=OformulaAsH3O4inchiInChI=1S/AsH3O4/c2-1(3,4)5/h(H3,2,3,4,5)inchikeyDJHGAFSJWGLOIV-UHFFFAOYSA-Npolar_surface_area77.76refractivity9.14polarizability7.07rotatable_bond_count0acceptor_count4donor_count3physiological_charge-2formal_charge0Specdb::CMs26152Specdb::CMs156450Specdb::MsIr2697Specdb::MsIr2698Specdb::MsIr2699Specdb::MsMs27152Specdb::MsMs27153Specdb::MsMs27154Specdb::MsMs33710Specdb::MsMs33711Specdb::MsMs33712Specdb::MsMs2342613Specdb::MsMs2342614Specdb::MsMs2342615Specdb::MsMs2595925Specdb::MsMs2595926Specdb::MsMs2595927HMDB1219029125AnatidaeType 1specificAnatidae8830BeefaloType 1specificBos taurus X Bison bison297284BisonType 1specificBison bison9901BuffaloType 1specificBubalus bubalis89462Cattle (Beef, Veal)Type 1specificBos taurus9913ChickenType 1specificGallus gallus9031Columbidae (Dove, Pigeon)Type 1specificColumbidae8930DeerType 1specificCervidae9850Domestic goatType 1specificCapra aegagrus hircus9925Domestic pigType 1specificSus scrofa domestica9825ElkType 1specificCervus canadensis1574408EmuType 1specificDromaius novaehollandiae8790European rabbitType 1specificOryctolagus9984Greylag gooseType 1specificAnser anser8843Guinea henType 1specificNumida meleagris8996HorseType 1specificEquus caballus9796Mallard duckType 1specificAnas platyrhynchos8839Mountain hareType 1specificLepus timidus62621Mule deerType 1specificOdocoileus9871OstrichType 1specificStruthio camelus8801PheasantType 1specificPhasianus colchicus9054QuailType 1specificPhasianidae9005RabbitType 1specificLeporidae9979Rock ptarmiganType 1specificLagopus muta64668Sheep (Mutton, Lamb)Type 1specificOvis aries9940SquabType 1specificColumba8931TurkeyType 1specificMeleagris gallopavo9103Velvet duckType 1specificMelanitta fusca371864Wild boarType 1specificSus scrofa9823