Tässä artikkelissa katsotaan asiaa varjon puolelta, siis jos proliinin (Pro) aineenvaihdunnassa olisi jokin synnynnäinen puutos.. Suomennan tekstistä. Lopuksi mainitaan myös Hyp, OH-Pro.
J Nutr. 2008 Oct;138(10):2016S-2020S. Inborn errors of proline metabolism.
Source
Department of Pediatrics, Kumamoto University Graduate School of Medical Science, Kumamoto University, Kumamoto 860-8556, Japan.Abstract, TIIVISTELMÄ- l-Proline concentration is primarily related to the balance of enzymatic activities of proline dehydrogenase [proline oxidase (POX)] and Delta-1-pyrroline-5-carboxylate (P5C) reductase.
POX on proliinidehydrogenaasi eli proliinioksidaasi. P5C on delta- 1 pyrrolidiini-5-karboksylaatin reduktaasi.http://www.biology-online.org/articles/arginine_nutrition_neonatal_pigs/figures.html
- As a result, P5C plays a pivotal role in maintaining the concentration of proline in body fluids and inborn errors of P5C metabolism lead to disturbance of proline metabolism.
- Several inborn errors of proline metabolism have been described.
- Hyperprolinemia type I (HPI) is a result of a deficiency in POX.
- The POX gene (PRODH) is located on chromosome 22 (22q11.2) and this region is deleted in velo-cardio-facial syndrome, a congenital malformation syndrome.
- In addition, this gene locus is related to susceptibility to schizophrenia.
- The other type of hyperprolinemia is HPII.
- It is caused by a deficiency in P5C dehydrogenase activity.
- Hypoprolinemia, on the other hand, is found in the recently described deficiency of P5C synthetase.
- This enzyme defect leads to hyperammonemia associated with hypo-ornithinemia, hypocitrullinemia, and hypoargininemia other than hyp-PRO-emia.
- Hyperhydroxyprolinemia (Hyper HYP- emia) is an autosomal recessive inheritance disorder caused by the deficiency of hydroxyproline oxidase.
- There are no symptoms and it is believed to be a benign metabolic disorder.
- The deficiency of ornithine aminotransferase causes transient hyperammonemia during early infancy due to deficiency of ornithine in the urea cycle.
- In later life, gyrate atrophy of the retina occurs due to hyperornithinemia, a paradoxical phenomenon.
- Finally, prolidase deficiency is a rare autosomal recessive hereditary disease.
Prolidase catalyzes hydrolysis of dipeptide or oligopeptide with a C-terminal proline (Pro) or hydroxyproline (Hyp) and its deficiency can cause mental retardation and severe skin ulcers.
Prolidaasi katalysoi C-terminaalista proliinia tai OH-proliinia (Hyp) sisältävien dipeptidien tai oligopeptidien hydrolyysiä. Tämän entsyymin puute voi aiheuttaa mentaalista retardoitumista ja vaikeita ihohaavoja.
Metalloentsyymi,, Mn2++.
Seerumin prolidaasiaktiivisuus laskee benignissä nivelten hypermotiliteetissa.
Seerumin prolidaasiaktiivisuus nousee PCOS riski, menstr. epäsäännöllisyyksiä.
PROLINASE 5-OXO-proline (ATP-hydrolysiing)
OPLAH geeni , 5-OPASE, Kr. 8q24.3 , Pyroglutamase . Muuttaa 5-oxo-L-proliinin L-glutamiinihapoksi. Entsyymissä on 1288 aminohappoa ja siinä on QP ja PPP rakenteita.
( Olisiko altis esim keliakiavasta-aineille?)
http://www.spektrum.de/lexikon/biochemie/gamma-glutamylzyklus/2568
PROLINASE 5-OXO-proline (ATP-hydrolysiing)
OPLAH geeni , 5-OPASE, Kr. 8q24.3 , Pyroglutamase . Muuttaa 5-oxo-L-proliinin L-glutamiinihapoksi. Entsyymissä on 1288 aminohappoa ja siinä on QP ja PPP rakenteita.
( Olisiko altis esim keliakiavasta-aineille?)
http://www.spektrum.de/lexikon/biochemie/gamma-glutamylzyklus/2568
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