Phycourobilin

Phycourobilin

Chembox new
ImageFile=phycourobilin.pngImageSize=200px
IUPACName=3- [2- [("Z")- [3-(2-carboxyethyl)-5- [ [("2R")-4-ethyl-3-methyl-5-oxo-1,2-dihydropyrrol-2-yl] methyl] -4-methyl-2-pyrrolylidene] methyl] -5- [ [("2S")-3-ethyl-4-methyl-5-oxo-1,2-dihydropyrrol-2-yl] methyl] -4-methyl-"1H"-pyrrol-3-yl] propanoic acid
OtherNames=
Section1= Chembox Identifiers
CASNo=61932-71-6
PubChem=5289229
SMILES=CCC1=C(C(=O)N [C@H] 1CC2=C(C(=C(N2)C=C/3C(=C(C(=N3)C [C@@H] 4C(=C(C(=O)N4)CC)C)C)CCC(=O)O)CCC(=O)O)C)C

Section2= Chembox Properties
Formula=C33H42N4O6
MolarMass=590.71
Appearance=
Density=
MeltingPt=
BoilingPt=
Solubility=

Section3= Chembox Hazards
MainHazards=
FlashPt=
Autoignition=

Phycourobilin is a tetrapyrrole orange molecule involved in photosynthesis in cyanobacteria and red algae. This chromophore is bound to the phycobiliprotein phycoerythrin, the distal component of the light-harvesting system of cyanobacteria and red algae (phycobilisome).

When bound to phycoerythrin, phycourobilin shows an absorption maximum around 495 nm. This chromophore is always a donor chromophore of phycoerythrins, since their acceptor chromophore is always phycoerythrobilin. It can also be linked to the linker polypeptides of the phycobilisome, in which its precise role remains unclear.

Phycourobilin is found in marine phycobilisome containing organisms, allowing them to efficiently absorb blue-green light. In the ubiquitous marine cyanobacteria "Synechococcus", the amount of phycourobilin in the phycobilisomes is correlated to the ecological niche the cells inhabit: offshore "Synechococcus" are quite phycourobililin-rich, while coastal "Synechococcus" contain very little or no phycourobilin. This represents a remarkable adaptation of the cyanobacterial light-harvesting system, as oceanic waters are relatively richer in blue light than onshore waters.


Wikimedia Foundation. 2010.

Игры ⚽ Нужно решить контрольную?

Look at other dictionaries:

  • phycourobilin — noun A tetrapyrrole orange molecule involved in photosynthesis in cyanobacteria and red algae …   Wiktionary

  • Bilirubin — Bilirubin …   Wikipedia

  • Corrin — For other uses, see Corrin (disambiguation). Corrin Identifiers CAS number …   Wikipedia

  • Porphyrin — Structure of porphine, the simplest porphyrin Heme group of hemoglobin. An …   Wikipedia

  • Chlorin — Not to be confused with chlorine. Chlorin Identifiers CAS number …   Wikipedia

  • Phycobilin — Phycobilins (from Greek: polytonic|φύκος (phykos) meaning alga , and from Latin: bilis meaning bile ) are chromophores (light capturing molecules) found in cyanobacteria and in the chloroplasts of red algae, glaucophytes and some cryptomonads… …   Wikipedia

  • Phycoerythrin — is a red protein from the light harvesting phycobiliprotein family, present in cyanobacteria, red algae and cryptomonads.Like all phycobiliproteins, phycoerythrin is composed of a protein part, organised in a hexameric structure of alpha and beta …   Wikipedia

  • Phycobilisome — Phycobilisomes are light harvesting antennae of photosystem II in cyanobacteria, red algae and glaucophytes. General structure Phycobilisomes are protein complexes (up to 600 polypeptides) anchored to thylakoid membranes. They are made of stacks… …   Wikipedia

  • Coproporphyrinogens — are tetrapyrroles with four propionic acid groups and an equal number of substituted methyls. Coproporphyrinogen III is the most common variance. In the metabolism of porphyrin, it is formed from uroporphyrinogen III by the enzyme… …   Wikipedia

  • Coproporphyrinogen III — Identifiers CAS number 2624 63 7 …   Wikipedia

Share the article and excerpts

Direct link
Do a right-click on the link above
and select “Copy Link”