Peridinin

Peridinin

Names
IUPAC name Acetic acid [(1S,3R)-3-hydroxy-4-[(3E,5E,7E,9E,11Z)-11-[4-[(E)-2-[(1S,4S,6R)-4-hydroxy-2,2,6-trimethyl-7-oxabicyclo[4.1.0]heptan-1-yl]vinyl]-5-oxo-2-furylidene]-3,10-dimethylundeca-1,3,5,7,9-pentaenylidene]-3,5,5-trimethylcyclohexyl] ester
Identifiers
CAS Number	33281-81-1
3D model (Jmol)	Interactive image
PubChem	5289155
SMILES [H][C@@](/[C@@](C)=C/C=C/C=C/C=C(C)/C=C2C=C(/C=C/[C@@]3(O4)[C@]4(C)C[C@@H](O)CC(C)3C)C(O\2)=O)=C=C1[C@](C)(O)C[C@@H](OC(C)=O)CC(C)1C
Properties
Chemical formula	C39H50O7
Molar mass	630.82 g·mol^−1
Except where otherwise noted, data are given for materials in their standard state (at 25 °C [77 °F], 100 kPa).
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Infobox references

Peridinin is a light-harvesting carotenoid, a pigment associated with chlorophyll and found in the peridinin-chlorophyll-protein (PCP) light-harvesting complex in dinoflagellates, best studied in Amphidinium carterae.^[1]

Biological significance

Crystal structure of the soluble peridinin-chlorophyll-protein complex from the photosynthetic dinoflagellate Amphidinium carterae. This complex is found in many photosynthetic dinoflagellates and involves a boat or cradle-shaped protein with two pseudosymmetrical repeats of eight alpha helices (shown in blue and orange) wrapped around a pigment-filled central cavity. Each eight-helix segment binds one chlorophyll molecule (green, with central magnesium ion shown as a green sphere), one diacylglycerol molecule (yellow) and four peridinin molecules (gray).^[2]

Peridinin is a carotenoid pigment that some organisms use in photosynthesis. Many photosynthetic dinoflagellates use peridinin, which absorbs blue-green light in the 470-550nm range, outside the range accessible to chlorophyll molecules. The peridinin-chlorophyll-protein complex is a specialized molecular complex consisting of a boat-shaped protein molecule with a large central cavity that contains peridinin, chlorophyll, and lipid molecules, usually in a 4:1 ratio of peridinin to chlorophyll.^[2][3][4]

Spectral characteristics

Emission and excitation spectra of Peridinin Chlorophyll (PerCP)

• Absorption maximum: 483 nm<
• Emission maximum: 676 nm

• Extinction coefficient (ε): 1.96 x 10⁶ M⁻¹cm⁻¹

• A₄₈₃/A₂₈₀ ≥ 4.6

Applications

Peridinin chlorophyll (PerCP) is commonly used in immunoassays such as fluorescence-activated cell sorting (FACS) and flow cytometry. The fluorophore is covalently linked to proteins or antibodies for use in research applications.^[5]

References

1. Hofmann E, Wrench PM, Sharples FP, Hiller RG, Welte W, Diederichs K (1996). "Structural basis of light harvesting by carotenoids: peridinin-chlorophyll-protein from Amphidinium carterae". Science. 272 (5269): 1788–1791. doi:10.1126/science.272.5269.1788. PMID 8650577.
2. Hofmann, E; Wrench, PM; Sharples, FP; Hiller, RG; Welte, W; Diederichs, K (21 June 1996). "Structural basis of light harvesting by carotenoids: peridinin-chlorophyll-protein from Amphidinium carterae.". Science (New York, N.Y.). 272 (5269): 1788–91. PMID 8650577.
3. Schulte, Tim; Johanning, Silke; Hofmann, Eckhard (December 2010). "Structure and function of native and refolded peridinin-chlorophyll-proteins from dinoflagellates". European Journal of Cell Biology. 89 (12): 990–997. doi:10.1016/j.ejcb.2010.08.004.
4. Jiang, Jing; Zhang, Hao; Kang, Yisheng; Bina, David; Lo, Cynthia S.; Blankenship, Robert E. (July 2012). "Characterization of the peridinin–chlorophyll a-protein complex in the dinoflagellate Symbiodinium". Biochimica et Biophysica Acta (BBA) - Bioenergetics. 1817 (7): 983–989. doi:10.1016/j.bbabio.2012.03.027.
5. "Peridinin Chlorophyll (PerCP)".