Share to: share facebook share twitter share wa share telegram print page

Pektinase

Kulit kayu yang keras diakibatkan oleh adanya berbagai senyawa polisakarida kompleks, seperti pektin.

Pektinase adalah enzim yang digunakan dalam proses degradasi molekul pektin (sejenis kompleks polisakarida).[1] Di dalam sel tanaman, pektin banyak berperan dalam membentuk struktur tubuh yang kuat.[1] Terdapat beberapa jenis molekul pektin yang dapat didegradasi oleh pektinase, antara lain protopektin, pektin, asam pektinat, asam pektik, dan rhamnogalakturonan.[1]

Peranan di alam

Pektinase terlibat dalam siklus karbon di alam karena mampu mendegradasi molekul keras pektin.[1] Hasil dari pemecahan pektin adalah molekul galakturonan jenuh dan tak jenuh.[1] Galakturonan kemudian akan segera dikatabolis menjadi 5-keto-4-deoksi-uronat.[1] Pada reaksi selanjutnya, molekul ini akan diubah menjadi piruvat dan 3-fosfogliseraldehida.[2]

Terdapat beberapa jenis mikroorganisme yang mampu menghasilkan enzim pektinase, seperti Aspergillus flavus, Fusarium oxysporum, dan Botrytis cinerea.[3][4] Poligalakturonase, salah satu jenis enzim golongan pektin, berperan dalam proses pematangan buah secara alami.[5]

Referensi

  1. ^ a b c d e f Poliana J, MacCabe AP. 2007. Industrial Enzymes; Structure, Function, and Applications. Dordrecht: Springer. Halaman: 99-100. ISBN 978-1-4020-5376-4
  2. ^ Vincent-Sealy LV, Thomas JD, Commander P, Salmond GP. 1999. Erwinia carotovora DsbA mutants: evidence for a periplasmic-stress signal transduction system affecting transcription of genes encoding secreted proteins. Microbiology 145:1945–58.
  3. ^ Lang C, Dörenberg H. 2000. Perspective in the biological function and the technological applications of polygalacturonases. Appl Microbiol Biotechnol 53:366–375.
  4. ^ DiPietro A, Roncero MI. 1996. Purification and characterization of an exo-polygalacturonase from the tomato vascular wilt pathogen Fusarium oxysporum f.sp. lycopersici. FEMS Microbiol Lett 145:295–299.
  5. ^ Chin L, Ali ZM, Lazan H. 1999. Cell wall modifications, degrading enzymes and softening of carambola fruit during ripening. J Experimental Botany 50:767–775.

Read other articles:

Festival Internacional de Cinema de Montreal

Cinema Informação geral História do cinema Cinema lusófono Processos cinematográficos Roteiro Tratamento Pré-produção Filmagem Produção Pós-produção Sonorização Decupagem Montagem Edição Legendagem Dublagem/dobragem Continuidade Trilha sonora Efeito sonoro Efeito especial Making-of Cinema por país Alemanha Angola Argentina Armênia Azerbaijão Brasil Chile Coreia do Sul Escandinávia Espanha EUA França Índia Itália Irã Japão México Noruega Portugal Reino Unido Rússia Su

 

Barrel threads

Method to attach a weapon barrel and receiver In firearms, barrel threads refer to the screw threads used to attach a barrel. Action threads, also called receiver threads, are situated at the chamber end of the barrel, and can be used for attaching the barrel to the receiver. The receiver normally has corresponding threads which are internal, with the matching action threads on the barrel usually being external threads. This design is most commonly used in rifles and revolvers, but also on so...

 

Elecciones estatales de Penang de 1955

              • 1959 → Elecciones estatales de 195514 escaños del Consejo Legislativo Estatal8 escaños necesarios para la mayoría Fecha 19 de febrero de 1955 Tipo Legislativa Duración de campaña 13 de enero a 18 de febrero de 1955 Demografía electoral Hab. registrados 60,168[1]​ Votantes 47,875 Participación    79.57 % Votos válidos 46,103 Votos nulos 1,772 Resultados Wong Pow Nee...

Santo Estêvão de Bastuço

Santo Estêvão de Bastuço Plaats in Portugal Situering District Braga Gemeente Barcelos Coördinaten 41° 30′ NB, 8° 32′ WL Algemeen Oppervlakte 1,93 km² Inwoners (2001) 456[1] (236,3 inw./km²) Detailkaart Ligging in gemeente Barcelos Foto's Kerk van Santo Estêvão de Bastuço Portaal    Portugal Santo Estêvão de Bastuço is een plaats (freguesia) in de Portugese gemeente Barcelos en telt 456 inwoners (2001). Bevolkingsontwikkeling tussen 1864 en 2011 Bro...

 

Moses Olaiya

Nigerian comedian, dramatist and actor (1936–2018) For the Ugandan footballer, see Moses Oloya. This article needs additional citations for verification. Please help improve this article by adding citations to reliable sources. Unsourced material may be challenged and removed.Find sources: Moses Olaiya – news · newspapers · books · scholar · JSTOR (October 2018) (Learn how and when to remove this template message) Moses OlaiyaBornMoses Olaiya Adejumo...

 

Sharecroppers' Union

Trade union of African American farmers The Sharecroppers' Union, also known as SCU or Alabama Sharecroppers’ Union, was a trade union of predominantly African American tenant farmers (commonly referred to as sharecroppers) in the American South that operated from 1931 to 1936. Its aims were to improve wages and working conditions for sharecroppers.[1] Founded in 1931 in Tallapoosa County, Alabama, the Sharecroppers' Union had its origins in the Croppers’ and Farm Workers’ Union...

العلاقات الساموية الكمبودية

العلاقات الساموية الكمبودية ساموا كمبوديا   ساموا   كمبوديا تعديل مصدري - تعديل   العلاقات الساموية الكمبودية هي العلاقات الثنائية التي تجمع بين ساموا وكمبوديا.[1][2][3][4][5] مقارنة بين البلدين هذه مقارنة عامة ومرجعية للدولتين: وجه المقارنة سام

 

Stadion Sriwedari

Artikel ini membutuhkan rujukan tambahan agar kualitasnya dapat dipastikan. Mohon bantu kami mengembangkan artikel ini dengan cara menambahkan rujukan ke sumber tepercaya. Pernyataan tak bersumber bisa saja dipertentangkan dan dihapus.Cari sumber: Stadion Sriwedari – berita · surat kabar · buku · cendekiawan · JSTOR (Oktober 2023)Monumen Stadion SriwedariNama sebagaimana tercantum dalamSistem Registrasi Nasional Cagar Budaya Cagar budaya IndonesiaKateg...

 

Konstitusi Meiji

Penetapan Konstitusi Meiji, karya Hashimoto Chikanobu. Konstitusi Kekaisaran Jepang (大日本帝國憲法, umumnya dikenal sebagai Konstitusi Meiji) adalah undang-undang Kekaisaran Jepang dari tahun 1889 hingga tahun 1947. Diberlakukan sebagai bagian dari Restorasi Meiji, undang-undang dasar ini mengizinkan adanya sebuah monarki konstitusional yang berdasarkan model Prusia yang menempatkan Kaisar Jepang sebagai penguasa aktif dan mempunyai kekuasaan politik yang besar, tetapi membagi hal ini...

Friedrich von Waldersee

Grab von Friedrich Graf von Waldersee auf dem Alten Friedhof in Potsdam Friedrich Gustav Graf von Waldersee (* 21. Juli 1795 in Dessau; † 15. Januar 1864 in Potsdam) war ein preußischer Generalleutnant sowie Kriegsminister und Militärschriftsteller. Inhaltsverzeichnis 1 Leben 1.1 Herkunft 1.2 Militärkarriere 1.3 Familie 2 Werke 3 Literatur 4 Weblinks 5 Einzelnachweise Leben Herkunft Friedrich Graf von Waldersee war ein Sohn von Franz Graf Waldersee, einem Sohn des Fürsten Leopold I...

 

Andrew Stuart (Ohio politician)

American journalist Andrew StuartTombstoneMember of the U.S. House of Representativesfrom Ohio's 21st districtIn officeMarch 4, 1853 – March 3, 1855Preceded byNorton Strange TownshendSucceeded byJohn Bingham Personal detailsBorn(1823-08-03)August 3, 1823Pittsburgh, PennsylvaniaDiedApril 30, 1872(1872-04-30) (aged 48)Washington, D.C.Resting placeUnion Cemetery, Steubenville, OhioPolitical partyDemocratic Andrew Stuart (August 3, 1823 – April 30, 1872) was a U....

 

義大利共和國 (拿破崙時代)

意大利共和国Repubblica Italiana1802年—1805年 国旗 国徽 1803年所可控制下的北意大利（意大利和法国之间的边界不準確）地位拿破崙一世治下的法蘭西第一共和國控制的傀儡國首都米兰常用语言意大利語宗教罗马天主教政府立宪共和国总统 • 1802年–1805年 拿破仑·波拿巴 副总统 • 1802年–1805年 弗朗切斯科·梅齐 立法机构咨询参议院历史时期拿破仑战争• 《�...

Defence Academy of the United Kingdom

UK government personnel higher education establishment Defence Academy of the United KingdomMottoIntellectual Excellence in DefenceTypeMilitaryEstablished2002, oldest constituent unit est. 1772DirectorAir Marshal Ian GaleLocationShrivenham and Watchfield, Oxfordshire, United Kingdom51°36′10.77″N 1°38′25.50″W / 51.6029917°N 1.6404167°W / 51.6029917; -1.6404167CampusRuralWebsitewww.da.mod.uk The Defence Academy of the United Kingdom provides higher education ...

 

Beer Hall Putsch

Failed 1923 Nazi coup attempt in Germany For the album by Doug Stanhope, see Beer Hall Putsch (album). Munich PutschBeer Hall PutschPart of Political violence in Germany (1918–1933)Nazis at the Marienplatz in Munich during the PutschDate8–9 November 1923LocationMunich, Bavaria, Weimar Republic48°07′48″N 11°35′31″E / 48.130°N 11.592°E / 48.130; 11.592ActionHitler and the Nazi Party planned to seize Munich and use the city as a base for a march against Ge...

 

Randolph M. Pate

United States Marine Corps general Randolph McCall PateGeneral Randolph M. PateBorn(1898-02-11)February 11, 1898Port Royal, South Carolina, U.S.DiedJuly 31, 1961(1961-07-31) (aged 63)National Naval Medical Center, Bethesda, Maryland, U.S.BuriedArlington National CemeteryAllegiance United States of AmericaService/branch United States Marine CorpsYears of service1918–1959Rank GeneralCommands heldCommandant of the Marine Corps2nd Marine Division1st Marine DivisionMarine Cor...

Zaman Klasik

Parthenon, contoh karya budaya Yunani Kuno, salah satu ikon Zaman Klasik yang paling terkenal. Zaman Klasik adalah kurun waktu abad ke-8 Pra-Masehi sampai abad ke-5 Tarikh Masehi dalam sejarah peradaban kawasan Laut Tengah,[note 1] teristimewa peradaban Yunani Kuno dan peradaban Romawi Kuno, dua serangkai yang lazim disebut Dunia Yunani-Romawi. Pada kurun waktu inilah masyarakat Yunani-Romawi berkembang dan meluaskan pengaruhnya ke seluruh Eropa, Afrika Utara, dan Asia Barat. Zaman Kl...

 

Ефіальт (міфологія)

У Вікіпедії є статті про інші значення цього терміна: Ефіальт (значення). Ефіальт (зліва, дивиться на мандрівників) разом з титанами та гігантами, на малюнку Гюстава Доре до «Божественної комедії» Данте Ефіальт (грец. Ἐφιάλτες, Ephialtes) — один з Алоадів, синів Посейдона і Іфі�...

 

List of primates of Colombia

The primates of Colombia include 41 extant species in 13 genera and five families.[1][2][3][4] Additionally, 12 fossil species in 10 genera and five families have been identified in Colombia, mainly at the La Venta Lagerstätte of the Honda Group, mostly from the so-called Monkey Unit, Monkey Beds or Monkey Locality,[5] the richest site for fossil primates in South America.[6] As of 2013, of the 30 fossil primate species found in South America d...

Syro-Malabar Cathedral of St Alphonsa, Preston

Church in Lancashire, United KingdomSyro-Malabar Cathedral of St AlphonsaEntrance from Meadow StreetSyro-Malabar Cathedral of St AlphonsaLocation in Preston53°45′49″N 2°41′48″W / 53.7637°N 2.6967°W / 53.7637; -2.6967OS grid referenceSD5416929933LocationPreston, LancashireCountryUnited KingdomDenominationCatholic (Syro-Malabar Catholic Church)TraditionEast Syriac RiteWebsiteofficial websiteHistoryFormer name(s)St Ignatius ChurchStatusCathedralFounded1833...

 

St. Bonaventure Bonnies

Intercollegiate sports teams of St. Bonaventure University St. Bonaventure BonniesUniversitySt. Bonaventure UniversityConferenceAtlantic 10 ConferenceNCAADivision IAthletic directorJoe ManhertzLocationSt. Bonaventure, New YorkVarsity teams17 (9 men's, 8 women's)Basketball arenaReilly CenterBaseball stadiumFred Handler Park at McGraw-Jennings FieldSoccer stadiumTom and Michelle Marra Athletics Field ComplexLacrosse stadiumTom and Michelle Marra Athletics Field ComplexMascotThe Bona WolfNicknam...

 
Kembali kehalaman sebelumnya