Glutamine (symbol Gln or Q)[3] is an α-amino acid that is used in the biosynthesis of proteins. Its side chain is similar to that of glutamic acid, except the carboxylic acid group is replaced by an amide. It is classified as a charge-neutral, polar amino acid. It is non-essential and conditionally essential in humans, meaning the body can usually synthesize sufficient amounts of it, but in some instances of stress, the body's demand for glutamine increases, and glutamine must be obtained from the diet.[4][5] It is encoded by the codons CAA and CAG. It is named after glutamic acid, which in turn is named after its discovery in cereal proteins, gluten.[6]
The one-letter symbol Q for glutamine was assigned in alphabetical sequence to N for asparagine, being larger by merely one methylene –CH2– group. Note that P was used for proline, and O was avoided due to similarity with D. The mnemonic Qlutamine was also proposed.[6]
Functions
Glutamine plays a role in a variety of biochemical functions:
Glutamine maintains redox balance by participating in glutathione synthesis and contributing to anabolic processes such as lipid synthesis by reductive carboxylation.[15]
Glutamine provides a source of carbon and nitrogen for use in other metabolic processes. Glutamine is present in serum at higher concentrations than other amino acids[16] and is essential for many cellular functions. Examples include the synthesis of nucleotides and non-essential amino acids.[17] One of the most important functions of glutamine is its ability to be converted into α-KG, which helps to maintain the flow of the tricarboxylic acid cycle, generating ATP via the electron carriers NADH and FADH2.[18] The highest consumption of glutamine occurs in the cells of the intestines,[7] kidney cells (where it is used for acid-base balance), activated immune cells,[19] and many cancer cells.[8][11][20]
Production
Glutamine is produced industrially using mutants of Brevibacterium flavum, which gives ca. 40 g/L in 2 days using glucose as a carbon source.[21]
Biosynthesis
Glutamine synthesis from glutamate and ammonia is catalyzed by the enzymeglutamine synthetase. The majority of glutamine production occurs in muscle tissue, accounting for about 90% of all glutamine synthesized. Glutamine is also released, in small amounts, by the lungs and brain.[22] Although the liver is capable of glutamine synthesis, its role in glutamine metabolism is more regulatory than productive, as the liver takes up glutamine derived from the gut via the hepatic portal system.[7]
Uses
Nutrition
Glutamine is the most abundant naturally occurring, nonessential amino acid in the human body, and one of the few amino acids that can directly cross the blood–brain barrier.[7] Humans obtain glutamine through catabolism of proteins in foods they eat.[23] In states where tissue is being built or repaired, like growth of babies, or healing from wounds or severe illness, glutamine becomes conditionally essential.[23]
Sickle cell disease
This section is missing information about (possible) mechanism of action, pharmacokinetics in PMID31985279. Please expand the section to include this information. Further details may exist on the talk page.(November 2023)
In 2017, the U.S. Food and Drug Administration (FDA) approved L-glutamine oral powder, marketed as Endari, to reduce severe complications of sickle cell disease in people aged five years and older with the disorder.[1]
The safety and efficacy of L-glutamine oral powder were studied in a randomized trial of subjects ages five to 58 years old with sickle cell disease who had two or more painful crises within the 12 months prior to enrollment in the trial.[1] Subjects were assigned randomly to treatment with L-glutamine oral powder or placebo, and the effect of treatment was evaluated over 48 weeks.[1] Subjects who were treated with L-glutamine oral powder experienced fewer hospital visits for pain treated with a parenterally administered narcotic or ketorolac (sickle cell crises), on average, compared to subjects who received a placebo (median 3 vs. median 4), fewer hospitalizations for sickle cell pain (median 2 vs. median 3), and fewer days in the hospital (median 6.5 days vs. median 11 days).[1] Subjects who received L-glutamine oral powder also had fewer occurrences of acute chest syndrome (a life-threatening complication of sickle cell disease) compared with patients who received a placebo (8.6 percent vs. 23.1 percent).[1]
Common side effects of L-glutamine oral powder include constipation, nausea, headache, abdominal pain, cough, pain in the extremities, back pain and chest pain.[1]
L-glutamine oral powder received orphan drug designation.[1] The FDA granted the approval of Endari to Emmaus Medical Inc.[1]
Medical food
Glutamine is marketed as medical food and is prescribed when a medical professional believes a person in their care needs supplementary glutamine due to metabolic demands beyond what can be met by endogenous synthesis or diet.[24]
Safety
Glutamine is safe in adults and in preterm infants.[25] Although glutamine is metabolized to glutamate and ammonia, both of which have neurological effects, their concentrations are not increased much, and no adverse neurological effects were detected.[25] The observed safe level for supplemental L-glutamine in normal healthy adults is 14 g/day.[26]
Adverse effects of glutamine have been described for people receiving home parenteral nutrition and those with liver-function abnormalities.[27]
Although glutamine has no effect on the proliferation of tumor cells, it is still possible that glutamine supplementation may be detrimental in some cancer types.[28]
Ceasing glutamine supplementation in people adapted to very high consumption may initiate a withdrawal effect, raising the risk of health problems such as infections or impaired integrity of the intestine.[28]
Structure
Glutamine can exist in either of two enantiomeric forms, L-glutamine and D-glutamine. The L-form is found in nature. Glutamine contains an α-amino group which is in the protonated −NH3+ form under biological conditions and a carboxylic acid group which is in the deprotonated −COO− form, known as carboxylate, under physiological conditions.
Research
Glutamine mouthwash may be useful to prevent oral mucositis in people undergoing chemotherapy but intravenous glutamine does not appear useful to prevent mucositis in the GI tract.[30]
Glutamine supplementation was thought to have potential to reduce complications in people who are critically ill or who have had abdominal surgery but this was based on poor quality clinical trials.[31] Supplementation does not appear to be useful in adults or children with Crohn's disease or inflammatory bowel disease, but clinical studies as of 2016 were underpowered.[14] Supplementation does not appear to have an effect in infants with significant problems of the stomach or intestines.[32]
Some athletes use L-glutamine as supplement. Studies support the positive effects of the chronic oral administration of the supplement on the injury and inflammation induced by intense aerobic and exhaustive exercise, but the effects on muscle recovery from weight training are unclear.[33]
Stress conditions for plants (drought, injury, soil salnity) cause the synthesis of such plant enzymes as superoxide dismutase, L-ascorbate oxidase, and Delta 1 DNA polymerase.[34] Limiting this process, initiated by the conditions of strong soil salinity can be achieved by administering exogenous glutamine to plants. The decrease in the level of expression of genes responsible for the synthesis of superoxide dismutase increases with the increase in glutamine concentration.[34]
^ abSaffran M (April 1998). "Amino acid names and parlor games: from trivial names to a one-letter code, amino acid names have strained students' memories. Is a more rational nomenclature possible?". Biochemical Education. 26 (2): 116–118. doi:10.1016/s0307-4412(97)00167-2. ISSN0307-4412.
^ abCorbet C, Feron O (July 2015). Corbet C, Feron O (eds.). "Metabolic and mind shifts: from glucose to glutamine and acetate addictions in cancer". Current Opinion in Clinical Nutrition and Metabolic Care. 18 (4): 346–353. doi:10.1097/MCO.0000000000000178. PMID26001655. S2CID1478014.
^Hall JE, Guyton AC (2006). Textbook of Medical Physiology (11th ed.). St. Louis, Mo: Elsevier Saunders. p. 393. ISBN978-0-7216-0240-0.
^Aledo JC (July 2004). "Glutamine breakdown in rapidly dividing cells: waste or investment?". BioEssays. 26 (7): 778–785. doi:10.1002/bies.20063. PMID15221859.
^Dabrowska K, Skowronska K, Popek M, Obara-Michlewska M, Albrecht J, Zielinska M (2018). "Roles of Glutamate and Glutamine Transport in Ammonia Neurotoxicity: State of the Art and Question Marks". Endocrine, Metabolic & Immune Disorders Drug Targets. 18 (4): 306–315. doi:10.2174/1871520618666171219124427. PMID29256360. S2CID26569656.
^ abYamamoto T, Shimoyama T, Kuriyama M (April 2017). "Dietary and enteral interventions for Crohn's disease". Current Opinion in Biotechnology. 44: 69–73. doi:10.1016/j.copbio.2016.11.011. PMID27940405.
^Welbourne TC (March 1979). "Ammonia production and glutamine incorporation into glutathione in the functioning rat kidney". Canadian Journal of Biochemistry. 57 (3): 233–237. doi:10.1139/o79-029. PMID436006.
^Shao A, Hathcock JN (April 2008). "Risk assessment for the amino acids taurine, L-glutamine and L-arginine". Regulatory Toxicology and Pharmacology. 50 (3): 376–399. doi:10.1016/j.yrtph.2008.01.004. PMID18325648.
Part of a series on theAnthropology of kinship Basic concepts Family Lineage Affinity Consanguinity Marriage Incest taboo Endogamy Exogamy Moiety Monogamy Polygyny Polygamy Concubinage Polyandry Bride price Bride service Dowry Parallel / cross cousins Cousin marriage Levirate Sororate Posthumous marriage Joking relationship Clan Cohabitation Fictive / Milk / Nurture kinship Descent Cognatic / Bilateral Matrilateral Lineal Collateral House society Avunculate...
Algoritme k tetangga terdekat (Inggris: k-nearest neighbour algorithmcode: en is deprecated , disingkat k-NN) adalah sebuah metode untuk melakukan klasifikasi terhadap objek berdasarkan data pemelajaran yang jaraknya paling dekat dengan objek tersebut. Data pemelajaran digambarkan ke ruang berdimensi banyak dengan tiap-tiap dimensi mewakili tiap ciri/fitur dari data. Klasifikasi data baru dilakukan dengan mencari label k tetangga terdekat. Label terbanyak yang muncul menjadi label data baru. ...
Nitrate de thorium Constituants du nitrate de thorium. Identification Nom UICPA Tétranitrate de thorium(IV) Synonymes Tétranitrate de thorium No CAS 13823-29-5 No ECHA 100.034.090 No CE 237-514-1 PubChem 26293 SMILES [N+](=O)([O-])[O-].[N+](=O)([O-])[O-].[N+](=O)([O-])[O-].[N+](=O)([O-])[O-].[Th+4] PubChem, vue 3D InChI Std. InChI : vue 3D InChI=1S/4NO3.Th/c4*2-1(3)4;/q4*-1;+4 Std. InChIKey : VGBPIHVLVSGJGR-UHFFFAOYSA-N Propriétés chimiques Formule N4O12...
Салоникский фронт Первой мировой войныОсновной конфликт: Первая мировая война Войска Антанты. Слева направо: солдаты из Индокитая, Франции, Сенегала, Британии, Российской империи, Италии, Сербии, Греции и Индии. Дата 27 октября 1915 — ноябрь 1918 Место Сербия, Черногория, Грец�...
Berikut merupakan maskapai penerbangan yang beroperasi di Jerman. Air Berlin Boeing 737-800 Blue Wings Airbus 320-200 Cirrus Airlines Embraer 170 Condor Airlines Boeing 757-300 Eurowings BAe 146-200 Germania Fokker 100 Germanwings Airbus A319 Lufthansa Boeing 747-400 LTU Airbus Airbus A330-200 OLT - Ostfriesische Lufttransport Fairchild Swearingen Metroliner TUIfly Boeing 737-700 AIRLINE IATA ICAO KODE PANGGIL MULAIOPERASI ACM Air Charter BVR BAVARIAN Aero Business Charter GBJ GLOBAL JET Aero...
Dalam nama yang mengikuti kebiasaan penamaan Slavia Timur ini, patronimiknya adalah Antonovich dan nama keluarganya adalah Cui. César Cui, 1910 César Antonovich Cui (bahasa Rusia: Цезарь Антонович Кюи, tr. Tsézar Antónovich Kyuí[a]; IPA: [ˈt͡sjezərʲ ɐnˈtonəvʲɪt͡ɕ kʲʊˈi] ( simak); Prancis: Cesarius Benjaminus Cui; 18 Januari [K.J.: 6 Januari] 1835 – 13 Maret 1918)[2] adalah seorang komponis dan kritikus m...
Marco Branca Branca all'Inter, 1998 circa Nazionalità Italia Altezza 181 cm Peso 75 kg Calcio Ruolo Attaccante Termine carriera 2001 CarrieraGiovanili 1981-1982Grosseto1982-1984CagliariSquadre di club1 1984-1986 Cagliari52 (4)1986-1987 Udinese18 (2)1987-1988 Sampdoria9 (1)1988-1990 Udinese55 (13)1990-1991 Sampdoria20 (5)1991-1992 Fiorentina23 (5)1992-1994 Udinese58 (22)1994-1995 Parma25 (7)1995 Roma7 (2)1995-1998 Inter52 (23)1998-1999&...
Disambiguazione – Se stai cercando l'omonima pratica neopagana, vedi nudità rituale. SkycladGli Skyclad al Rockharz Open Air 2018 Paese d'origine Inghilterra GenereFolk metal[1] Periodo di attività musicale1990 – in attività EtichettaScarlet Records Album pubblicati18 Studio12 Live2 Raccolte4 Sito ufficiale Modifica dati su Wikidata · Manuale Gli Skyclad sono un gruppo heavy metal britannico, considerato l'inventore del sottogenere folk metal[...
State park in Morris County, New Jersey Hacklebarney State ParkThe Black River, Hacklebarney State ParkShow map of New JerseyShow map of the United StatesTypeState ParkLocationMorris CountyCoordinates40°44′53″N 74°43′56″W / 40.74806°N 74.73222°W / 40.74806; -74.73222[1]Area1,186 acres (4.80 km2)Opened1924Operated byNew Jersey Division of Parks and ForestryVisitors100,000 visitors annuallyWebsiteOfficial website Hacklebarney State Park is a...
Dutch six-day track cycling race Six Days of RotterdamRace detailsDateEarly January (since 1971)RegionRotterdam, the NetherlandsDisciplineTrackTypeSix-day racingWeb sitewww.zesdaagserotterdam.nl HistoryFirst edition1936 (1936)Editions40 (as of 2023)Most recent Jan-Willem van Schip (NED) Yoeri Havik (NED) The Six Days of Rotterdam is a six-day track cycling race held annually in Rotterdam, the Netherlands at the Rotterdam Ahoy. The event was first held ...
SkIO redirects here. For the sport known as SkiO, see Ski-orienteering. This article includes a list of general references, but it lacks sufficient corresponding inline citations. Please help to improve this article by introducing more precise citations. (August 2013) (Learn how and when to remove this message) UGA Skidway Institute of OceanographyFormer namesSkidaway Institute of OceanographyTypeResearch and Teaching InstitutionEstablished1968DirectorClark AlexanderLocationSkidaway Island, G...
American midwest city City in Iowa, United StatesCouncil Bluffs, IowaCityHaymarket Historic District (2015)Motto: Iowa's Spirit[1]Location in IowaCouncil BluffsLocation within IowaShow map of IowaCouncil BluffsLocation within the United StatesShow map of the United StatesCoordinates: 41°15′50″N 95°53′45″W / 41.26389°N 95.89583°W / 41.26389; -95.89583Country United StatesState IowaCountyPottawattamieIncorporatedJanuary 19, 1853[2]Go...
2018 World Weightlifting ChampionshipsMenWomen55 kg45 kg61 kg49 kg67 kg55 kg73 kg59 kg81 kg64 kg89 kg71 kg96 kg76 kg102 kg81 kg109 kg87 kg+109 kg+87 kgvte Main article: 2018 World Weightlifting Championships The women's 81 kilograms competition at the 2018 World Weightlifting Championships was held on 8 November 2018.[1][2] Schedule Date Time Event 8 November 2018 14:25 Group B 17:25 Group A Medalists Event Gold Silver Bronze Snatch Lydia Valentín (ESP) 113 k...
Arabic term for intellect A visual rendition of the Islamic model of the soul showing the position of 'aql relative to other concepts based on a consensus of 18 surveyed academic and religious experts.[1] 'Aql (Arabic: عَقْل, romanized: ʿaql, lit. 'intellect') is an Arabic term used in Islamic philosophy and theology for the intellect or the rational faculty of the soul that connects humans to God. According to Islamic beliefs, 'aql is what guides ...
Chemical compound, food additive and dye Indigo Names Preferred IUPAC name [2(2')E]-[2,2'-Biindolylidene]-3,3'(1H,1'H)-dione Other names 2,2'-Bis(2,3-dihydro-3-oxoindolyliden), Indigotin Identifiers CAS Number 64784-13-0 Y 3D model (JSmol) Interactive image ChEMBL ChEMBL599552 Y ChemSpider 4477009 Y ECHA InfoCard 100.006.898 PubChem CID 10215 RTECS number DU2988400 UNII 1G5BK41P4F Y CompTox Dashboard (EPA) DTXSID3026279 InChI InChI=1S/C16H10N2O2/c19-15-9-5-1-3-7-11(9)17-13...
2017 Spanish filmUncertain GloryCatalan film posterCatalanIncerta glòria Directed byAgustí VillarongaScreenplay by Agustí Villaronga Coral Cruz Based onUncertain Gloryby Joan SalesProduced byIsona PassolaStarring Marcel Borràs Núria Prims Oriol Pla Bruna Cusí Luisa Gavasa Terele Pávez Fernando Esteso Juan Diego Productioncompanies Massa d'Or Produccions Televisió de Catalunya Distributed byAlfa PicturesRelease date 17 March 2017 (2017-03-17) (Spain) CountrySpainLan...
English television presenter Dermot O'LearyO'Leary in 2014BornSeán Dermot Fintan O'Leary (1973-05-24) 24 May 1973 (age 51)Colchester, Essex, EnglandOccupationBroadcasterYears active1998–presentEmployersITVBBC Radio 2Spouse Dee Koppang (m. 2012)Children1 Seán Dermot Fintan O'Leary (born 24 May 1973) is an English broadcaster. He presented the television talent show The X Factor on ITV from 2007 until its final series in 2018, with the exception ...
Chinese golfer (born 1999) Muni HeHe at the 2022 British Grand PrixPersonal informationFull nameMuni He[1]NicknameLily[2]Born (1999-06-17) 17 June 1999 (age 25)Chengdu, Sichuan, ChinaHeight163 cm (5 ft 4 in)Sporting nationality ChinaCareerCollegeUniversity of Southern CaliforniaTurned professional2017Current tour(s)LPGA Tour (joined 2019)Former tour(s)Symetra Tour (joined 2017)Professional wins1Number of wins by tourEpson Tour1Best results in LPGA majo...