Chromocene (T3D1450)

IdentificationTaxonomyBiological PropertiesPhysical PropertiesToxicity ProfileSpectraConcentrationsLinksReferencesGene RegulationTargets (5)XML
Targets (5)
Record Information
Version2.0
Creation Date2009-06-19 21:58:48 UTC
Update Date2014-12-24 20:23:55 UTC
Accession NumberT3D1450
Identification
Common NameChromocene
ClassSmall Molecule
DescriptionChromocene, formally known as bis(н_Њ‡5-cyclopentadienyl)chromium(II), is a chemical compound with the condensed structural formula . Each molecule contains an atom of chromium bound between two planar systems of five carbon atoms known as cyclopentadienyl (Cp) rings in a sandwich arrangement, which is the reason its formula is often abbreviated as Cp2Cr. Chromium compounds are toxic, although Cr(VI) species are usually considered more dangerous than reduced chromium compounds. Chromocene is highly reactive toward air and could ignite upon exposure to the atmosphere.
Compound Type
  • Aromatic Hydrocarbon
  • Chromium Compound
  • Industrial/Workplace Toxin
  • Organic Compound
  • Organometallic
  • Pollutant
  • Synthetic Compound
Chemical Structure
Thumb
MOLSDFPDBSMILESInChI
Synonyms
Synonym
Bis(.eta.5-cyclopentadienyl) chromium
Bis(cyclopentadiene)chromium
Bis(cyclopentadiene)chromium(II)
Bis(cyclopentadienyl)chromium
Bis(cyclopentadienyl)chromium(II)
Bis(eta5-cyclopenta-2,4-dien-1-yl)chromium
Chromium, bis(eta(5)-2,4-cyclopentadien-1-yl)
Di((eta-5)-cyclopentadienyl)chromium
Dicyclopentadienylchromium
Chemical FormulaC10H10Cr
Average Molecular Mass182.183 g/mol
Monoisotopic Mass182.019 g/mol
CAS Registry Number1271-24-5
IUPAC Nameλ²-chromium(2+) ion bis(cyclopenta-2,4-dien-1-ide)
Traditional Nameλ²-chromium(2+) ion bis(cyclopentadienide)
SMILES[Cr++].[CH-]1C=CC=C1.[CH-]1C=CC=C1
InChI IdentifierInChI=1S/2C5H5.Cr/c2*1-2-4-5-3-1;/h2*1-5H;/q2*-1;+2
InChI KeyInChIKey=TYYBBNOTQFVVKN-UHFFFAOYSA-N
Chemical Taxonomy
Description belongs to the class of organic compounds known as aromatic hydrocarbons. These are aromatic compounds that are made up of carbon and hydrogen atoms only.
KingdomOrganic compounds
Super ClassHydrocarbons
ClassAromatic hydrocarbons
Sub ClassNot Available
Direct ParentAromatic hydrocarbons
Alternative Parents
Substituents
  • Aromatic hydrocarbon
  • Unsaturated hydrocarbon
  • Organic salt
  • Aromatic homomonocyclic compound
Molecular FrameworkNot Available
External DescriptorsNot Available
Biological Properties
StatusDetected and Not Quantified
OriginExogenous
Cellular Locations
  • Membrane
Biofluid LocationsNot Available
Tissue LocationsNot Available
PathwaysNot Available
ApplicationsNot Available
Biological RolesNot Available
Chemical RolesNot Available
Physical Properties
StateSolid
AppearanceDark red crystals.
Experimental Properties
PropertyValue
Melting PointNot Available
Boiling PointNot Available
SolubilityNot Available
LogPNot Available
Predicted Properties
PropertyValueSource
Water Solubility0.11 g/LALOGPS
logP3.12ALOGPS
logP2.25ChemAxon
logS-3.2ALOGPS
pKa (Strongest Acidic)16.23ChemAxon
Physiological Charge0ChemAxon
Hydrogen Acceptor Count0ChemAxon
Hydrogen Donor Count0ChemAxon
Polar Surface Area0 ŲChemAxon
Rotatable Bond Count0ChemAxon
Refractivity21.72 m³·mol⁻¹ChemAxon
Polarizability7.4 ųChemAxon
Number of Rings2ChemAxon
Bioavailability1ChemAxon
Rule of FiveYesChemAxon
Ghose FilterYesChemAxon
Veber's RuleYesChemAxon
MDDR-like RuleYesChemAxon
Spectra
Spectra
Spectrum TypeDescriptionSplash KeyDeposition DateView
MSMass Spectrum (Electron Ionization)splash10-001i-3900000000-61524a7844d8c978713c2014-09-20View Spectrum
Toxicity Profile
Route of ExposureOral (5) ; inhalation (5) ; dermal (5)
Mechanism of ToxicityTrivalent chromium may also form complexes with peptides, proteins, and DNA, resulting in DNA-protein crosslinks, DNA strand breaks, DNA-DNA interstrand crosslinks, chromium-DNA adducts, chromosomal aberrations and alterations in cellular signaling pathways. It has been shown to induce carcinogenesis by overstimulating cellular regulatory pathways and increasing peroxide levels by activating certain mitogen-activated protein kinases. It can also cause transcriptional repression by cross-linking histone deacetylase 1-DNA methyltransferase 1 complexes to CYP1A1 promoter chromatin, inhibiting histone modification. Chromium may increase its own toxicity by modifying metal regulatory transcription factor 1, causing the inhibition of zinc-induced metallothionein transcription. (1, 5, 2, 3, 4)
MetabolismChromium is absorbed from oral, inhalation, or dermal exposure and distributes to nearly all tissues, with the highest concentrations found in kidney and liver. Bone is also a major storage site and may contribute to long-term retention. Hexavalent chromium's similarity to sulfate and chromate allow it to be transported into cells via sulfate transport mechanisms. Inside the cell, hexavalent chromium is reduced first to pentavalent chromium, then to trivalent chromium by many substances including ascorbate, glutathione, and nicotinamide adenine dinucleotide. Chromium is almost entirely excreted with the urine. (1, 5)
Toxicity ValuesNot Available
Lethal DoseNot Available
Carcinogenicity (IARC Classification)No indication of carcinogenicity (not listed by IARC). (7)
Uses/SourcesChromocene is used as a catalyst. (8)
Minimum Risk LevelNot Available
Health EffectsChromium in its trivalent state is not very toxic. It may be oxidized to hexavalent chromium, a known carcinogen. Hexavalent chromium has also been shown to affect reproduction and development. (1)
SymptomsChromium in its trivalent state is not very toxic, but it may be oxidized to hexavalent chromium. Breathing hexavalent chromium can cause irritation to the lining of the nose, nose ulcers, runny nose, and breathing problems, such as asthma, cough, shortness of breath, or wheezing. Ingestion of hexavalent chromium causes irritation and ulcers in the stomach and small intestine, as well as anemia. Skin contact can cause skin ulcers. (5)
TreatmentThere is no know antidote for chromium poisoning. Exposure is usually handled with symptomatic treatment. (5)
Normal Concentrations
Not Available
Abnormal Concentrations
Not Available
DrugBank IDNot Available
HMDB IDNot Available
PubChem Compound ID79154
ChEMBL IDNot Available
ChemSpider ID71485
KEGG IDNot Available
UniProt IDNot Available
OMIM ID
ChEBI ID30677
BioCyc IDALPHAALPHA-TREHALOSE-66-BISMYCOLATE
CTD IDNot Available
Stitch IDChromocene
PDB IDNot Available
ACToR IDNot Available
Wikipedia LinkNot Available
References
Synthesis ReferenceNot Available
MSDST3D1450.pdf
General References
  1. Salnikow K, Zhitkovich A: Genetic and epigenetic mechanisms in metal carcinogenesis and cocarcinogenesis: nickel, arsenic, and chromium. Chem Res Toxicol. 2008 Jan;21(1):28-44. Epub 2007 Oct 30. [17970581 ]
  2. Kim G, Yurkow EJ: Chromium induces a persistent activation of mitogen-activated protein kinases by a redox-sensitive mechanism in H4 rat hepatoma cells. Cancer Res. 1996 May 1;56(9):2045-51. [8616849 ]
  3. Schnekenburger M, Talaska G, Puga A: Chromium cross-links histone deacetylase 1-DNA methyltransferase 1 complexes to chromatin, inhibiting histone-remodeling marks critical for transcriptional activation. Mol Cell Biol. 2007 Oct;27(20):7089-101. Epub 2007 Aug 6. [17682057 ]
  4. Kimura T: [Molecular mechanism involved in chromium(VI) toxicity]. Yakugaku Zasshi. 2007 Dec;127(12):1957-65. [18057785 ]
  5. ATSDR - Agency for Toxic Substances and Disease Registry (2008). Toxicological profile for chromium. U.S. Public Health Service in collaboration with U.S. Environmental Protection Agency (EPA). [Link]
  6. Wikipedia. Chromium. Last Updated 5 March 2009. [Link]
  7. International Agency for Research on Cancer (2014). IARC Monographs on the Evaluation of Carcinogenic Risks to Humans. [Link]
  8. Wikipedia. Chromocene. Last Updated 1 June 2009. [Link]
Gene Regulation
Up-Regulated GenesNot Available
Down-Regulated GenesNot Available

Targets

Target Details
1. Histone deacetylase 1
General Function:
Transcription regulatory region sequence-specific dna binding
Specific Function:
Responsible for the deacetylation of lysine residues on the N-terminal part of the core histones (H2A, H2B, H3 and H4). Histone deacetylation gives a tag for epigenetic repression and plays an important role in transcriptional regulation, cell cycle progression and developmental events. Histone deacetylases act via the formation of large multiprotein complexes. Deacetylates SP proteins, SP1 and SP3, and regulates their function. Component of the BRG1-RB1-HDAC1 complex, which negatively regulates the CREST-mediated transcription in resting neurons. Upon calcium stimulation, HDAC1 is released from the complex and CREBBP is recruited, which facilitates transcriptional activation. Deacetylates TSHZ3 and regulates its transcriptional repressor activity. Deacetylates 'Lys-310' in RELA and thereby inhibits the transcriptional activity of NF-kappa-B. Deacetylates NR1D2 and abrogates the effect of KAT5-mediated relieving of NR1D2 transcription repression activity. Component of a RCOR/GFI/KDM1A/HDAC complex that suppresses, via histone deacetylase (HDAC) recruitment, a number of genes implicated in multilineage blood cell development. Involved in CIART-mediated transcriptional repression of the circadian transcriptional activator: CLOCK-ARNTL/BMAL1 heterodimer. Required for the transcriptional repression of circadian target genes, such as PER1, mediated by the large PER complex or CRY1 through histone deacetylation.
Gene Name:
HDAC1
Uniprot ID:
Q13547
Molecular Weight:
55102.615 Da
References
  1. Schnekenburger M, Talaska G, Puga A: Chromium cross-links histone deacetylase 1-DNA methyltransferase 1 complexes to chromatin, inhibiting histone-remodeling marks critical for transcriptional activation. Mol Cell Biol. 2007 Oct;27(20):7089-101. Epub 2007 Aug 6. [17682057 ]
2. DNA
General Function:
Used for biological information storage.
Specific Function:
DNA contains the instructions needed for an organism to develop, survive and reproduce.
Molecular Weight:
2.15 x 1012 Da
References
  1. ATSDR - Agency for Toxic Substances and Disease Registry (2008). Toxicological profile for chromium. U.S. Public Health Service in collaboration with U.S. Environmental Protection Agency (EPA). [Link]
Target Details
3. Metal regulatory transcription factor 1
General Function:
Transcriptional activator activity, rna polymerase ii core promoter proximal region sequence-specific binding
Specific Function:
Activates the metallothionein I promoter. Binds to the metal responsive element (MRE).
Gene Name:
MTF1
Uniprot ID:
Q14872
Molecular Weight:
80956.22 Da
References
  1. Kimura T: [Molecular mechanism involved in chromium(VI) toxicity]. Yakugaku Zasshi. 2007 Dec;127(12):1957-65. [18057785 ]
Target Details
4. Mitogen-activated protein kinase 1
General Function:
Rna polymerase ii carboxy-terminal domain kinase activity
Specific Function:
Serine/threonine kinase which acts as an essential component of the MAP kinase signal transduction pathway. MAPK1/ERK2 and MAPK3/ERK1 are the 2 MAPKs which play an important role in the MAPK/ERK cascade. They participate also in a signaling cascade initiated by activated KIT and KITLG/SCF. Depending on the cellular context, the MAPK/ERK cascade mediates diverse biological functions such as cell growth, adhesion, survival and differentiation through the regulation of transcription, translation, cytoskeletal rearrangements. The MAPK/ERK cascade plays also a role in initiation and regulation of meiosis, mitosis, and postmitotic functions in differentiated cells by phosphorylating a number of transcription factors. About 160 substrates have already been discovered for ERKs. Many of these substrates are localized in the nucleus, and seem to participate in the regulation of transcription upon stimulation. However, other substrates are found in the cytosol as well as in other cellular organelles, and those are responsible for processes such as translation, mitosis and apoptosis. Moreover, the MAPK/ERK cascade is also involved in the regulation of the endosomal dynamics, including lysosome processing and endosome cycling through the perinuclear recycling compartment (PNRC); as well as in the fragmentation of the Golgi apparatus during mitosis. The substrates include transcription factors (such as ATF2, BCL6, ELK1, ERF, FOS, HSF4 or SPZ1), cytoskeletal elements (such as CANX, CTTN, GJA1, MAP2, MAPT, PXN, SORBS3 or STMN1), regulators of apoptosis (such as BAD, BTG2, CASP9, DAPK1, IER3, MCL1 or PPARG), regulators of translation (such as EIF4EBP1) and a variety of other signaling-related molecules (like ARHGEF2, DCC, FRS2 or GRB10). Protein kinases (such as RAF1, RPS6KA1/RSK1, RPS6KA3/RSK2, RPS6KA2/RSK3, RPS6KA6/RSK4, SYK, MKNK1/MNK1, MKNK2/MNK2, RPS6KA5/MSK1, RPS6KA4/MSK2, MAPKAPK3 or MAPKAPK5) and phosphatases (such as DUSP1, DUSP4, DUSP6 or DUSP16) are other substrates which enable the propagation the MAPK/ERK signal to additional cytosolic and nuclear targets, thereby extending the specificity of the cascade. Mediates phosphorylation of TPR in respons to EGF stimulation. May play a role in the spindle assembly checkpoint. Phosphorylates PML and promotes its interaction with PIN1, leading to PML degradation.Acts as a transcriptional repressor. Binds to a [GC]AAA[GC] consensus sequence. Repress the expression of interferon gamma-induced genes. Seems to bind to the promoter of CCL5, DMP1, IFIH1, IFITM1, IRF7, IRF9, LAMP3, OAS1, OAS2, OAS3 and STAT1. Transcriptional activity is independent of kinase activity.
Gene Name:
MAPK1
Uniprot ID:
P28482
Molecular Weight:
41389.265 Da
References
  1. Kim G, Yurkow EJ: Chromium induces a persistent activation of mitogen-activated protein kinases by a redox-sensitive mechanism in H4 rat hepatoma cells. Cancer Res. 1996 May 1;56(9):2045-51. [8616849 ]
Target Details
5. Mitogen-activated protein kinase 3
General Function:
Phosphatase binding
Specific Function:
Serine/threonine kinase which acts as an essential component of the MAP kinase signal transduction pathway. MAPK1/ERK2 and MAPK3/ERK1 are the 2 MAPKs which play an important role in the MAPK/ERK cascade. They participate also in a signaling cascade initiated by activated KIT and KITLG/SCF. Depending on the cellular context, the MAPK/ERK cascade mediates diverse biological functions such as cell growth, adhesion, survival and differentiation through the regulation of transcription, translation, cytoskeletal rearrangements. The MAPK/ERK cascade plays also a role in initiation and regulation of meiosis, mitosis, and postmitotic functions in differentiated cells by phosphorylating a number of transcription factors. About 160 substrates have already been discovered for ERKs. Many of these substrates are localized in the nucleus, and seem to participate in the regulation of transcription upon stimulation. However, other substrates are found in the cytosol as well as in other cellular organelles, and those are responsible for processes such as translation, mitosis and apoptosis. Moreover, the MAPK/ERK cascade is also involved in the regulation of the endosomal dynamics, including lysosome processing and endosome cycling through the perinuclear recycling compartment (PNRC); as well as in the fragmentation of the Golgi apparatus during mitosis. The substrates include transcription factors (such as ATF2, BCL6, ELK1, ERF, FOS, HSF4 or SPZ1), cytoskeletal elements (such as CANX, CTTN, GJA1, MAP2, MAPT, PXN, SORBS3 or STMN1), regulators of apoptosis (such as BAD, BTG2, CASP9, DAPK1, IER3, MCL1 or PPARG), regulators of translation (such as EIF4EBP1) and a variety of other signaling-related molecules (like ARHGEF2, FRS2 or GRB10). Protein kinases (such as RAF1, RPS6KA1/RSK1, RPS6KA3/RSK2, RPS6KA2/RSK3, RPS6KA6/RSK4, SYK, MKNK1/MNK1, MKNK2/MNK2, RPS6KA5/MSK1, RPS6KA4/MSK2, MAPKAPK3 or MAPKAPK5) and phosphatases (such as DUSP1, DUSP4, DUSP6 or DUSP16) are other substrates which enable the propagation the MAPK/ERK signal to additional cytosolic and nuclear targets, thereby extending the specificity of the cascade.
Gene Name:
MAPK3
Uniprot ID:
P27361
Molecular Weight:
43135.16 Da
References
  1. Kim G, Yurkow EJ: Chromium induces a persistent activation of mitogen-activated protein kinases by a redox-sensitive mechanism in H4 rat hepatoma cells. Cancer Res. 1996 May 1;56(9):2045-51. [8616849 ]