Uroerythrin

Uroerythrin is a red pigment present in the urine, where it is part of a group of yellow, brown and red pigments generally designated as urochrome.[2]

Uroerythrin
Names
IUPAC name
1,14,15,17-tetrahydro-2,7,13-trimethyl-1,14-dioxo-3-vinyl-16H-tripyrrin-8,12-dipropionic acid[1]
Other names
Biotripyrrin-a
Identifiers
3D model (JSmol)
ChemSpider
  • InChI=1S/C25H27N3O6/c1-5-15-13(3)24(33)27-19(15)10-18-12(2)16(6-8-22(29)30)20(26-18)11-21-17(7-9-23(31)32)14(4)25(34)28-21/h5,10-11,26H,1,6-9H2,2-4H3,(H,27,33)(H,28,34)(H,29,30)(H,31,32)/b19-10+,21-11+
    Key: DXWHHYOVLWSVQD-WOEXBRBNSA-N
  • InChI=1/C25H27N3O6/c1-5-15-13(3)24(33)27-19(15)10-18-12(2)16(6-8-22(29)30)20(26-18)11-21-17(7-9-23(31)32)14(4)25(34)28-21/h5,10-11,26H,1,6-9H2,2-4H3,(H,27,33)(H,28,34)(H,29,30)(H,31,32)/b19-10+,21-11+
    Key: DXWHHYOVLWSVQD-WOEXBRBNBP
  • CC1=C(/C(=C/C2=C(C(=C(N2)/C=C\3/C(=C(C(=O)N3)C)C=C)C)CCC(=O)O)/NC1=O)CCC(=O)O
Properties
C
25H
27N
3O
6
Molar mass 465.498
Except where otherwise noted, data are given for materials in their standard state (at 25 °C [77 °F], 100 kPa).
Infobox references

Urinary pigments

Pigments excreted in urine are partially absorbed by urate sediments ( sedimentum latrerium ), which consists of cell debris and sedimented urinary components formed when the acidified urine is stored below room temperature.[2] These urate sediments looks reddish or pink due to the presence of a main pigment first introduced by Simons in 1842 as uroerythrin,[3]

Clinical significance

From early clinical observations it is known that uroerythrin is present in every urine and increased amounts are observed in pathological states, e.g. metabolic disorders with high fever or tissue degradation.[4]

Chemical structure

The chemical structure of most of urochromes is still unknown, since they are very labile pigments that are easily decomposed in the light. In particular uroerythrin, remains unresolved until 1975 with previous papers that describes it like a peptidic compound.[5][6][7] In 1975 its structure was described based on mass spectrometry, infrared spectroscopy and nuclear magnetic resonance.[2]

References
  1. Xiang H. Wang (2008). "Medical Use of Bilirubin and its Structural Analogues".
  2. Josef BERUTER; Jean-Pierre COLOMBO & Urs Peter SCHLUNEGGER (1975). "Isolation and Identification of the Urinary Pigment Uroerythrin". Eur. J. Biochem. 56 (1): 239–244. doi:10.1111/j.1432-1033.1975.tb02226.x. PMID 1175621.
  3. Simon, J.F. (1842). Anthropochemie: 343. {{cite journal}}: Missing or empty |title= (help)
  4. Proust, L. (1800). Ann. Chem. (36): 265–269. {{cite journal}}: Missing or empty |title= (help)
  5. Minder, W. (1970) Doctoral thesis, University of Berne, CH
  6. Hansen, S. E. (1969) Acta Chenz. Scand. 23, 3461-3465
  7. Hansen, S. E. (1969) Acta Chenz. Scand. 23, 3466-3472
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