ENZYME entry: EC 2.4.1.18

Accepted Name
1,4-alpha-glucan branching enzyme.
Alternative Name(s)
Amylo-(1,4 to 1,6)transglucosidase.
Amylo-(1,4->1,6)-transglycosylase.
Branching enzyme.
Glycogen branching enzyme.
Reaction catalysed
Transfers a segment of a (1->4)-alpha-D-glucan chain to a primary hydroxy group in a similar glucan chain
Comment(s)
  • Converts amylose into amylopectin.
  • The description (official name) requires a qualification depending on the product, glycogen or amylopectin, e.g. glycogen branching enzyme, amylopectin branching enzyme.
  • The latter has frequently been termed Q-enzyme.
Cross-references
BRENDA2.4.1.18
EC2PDB2.4.1.18
ExplorEnz2.4.1.18
PRIAM enzyme-specific profiles2.4.1.18
KEGG Ligand Database for Enzyme Nomenclature2.4.1.18
IUBMB Enzyme Nomenclature2.4.1.18
IntEnz2.4.1.18
MEDLINEFind literature relating to 2.4.1.18
MetaCyc2.4.1.18
UniProtKB/Swiss-Prot
P9WQ26, BE_MYCTO;  P9WQ27, BE_MYCTU;  Q5JDJ7, BE_THEKO;  
Q5SH28, BE_THET8;  O23647, GLGB1_ARATH;  Q8XPA2, GLGB1_CLOPE;  
Q0SWZ1, GLGB1_CLOPS;  Q41058, GLGB1_PEA;  Q2K487, GLGB1_RHIEC;  
Q1MBS9, GLGB1_RHIL3;  Q82JF0, GLGB1_STRAW;  Q59833, GLGB1_STRCO;  
Q8PR13, GLGB1_XANAC;  Q3BZE1, GLGB1_XANC5;  Q4V0E2, GLGB1_XANC8;  
Q8PE48, GLGB1_XANCP;  Q2P9F7, GLGB1_XANOM;  Q5H6H2, GLGB1_XANOR;  
Q9LZS3, GLGB2_ARATH;  Q8XK15, GLGB2_CLOPE;  Q0SSN2, GLGB2_CLOPS;  
Q41059, GLGB2_PEA;  Q2JZ21, GLGB2_RHIEC;  Q1M3A7, GLGB2_RHIL3;  
Q825Q8, GLGB2_STRAW;  Q59832, GLGB2_STRCO;  Q8PQA2, GLGB2_XANAC;  
Q3BYI0, GLGB2_XANC5;  Q4UZL7, GLGB2_XANC8;  Q8PDD1, GLGB2_XANCP;  
Q2P949, GLGB2_XANOM;  Q5H6Q3, GLGB2_XANOR;  D2WL32, GLGB3_ARATH;  
A3MZ64, GLGB_ACTP2;  B3H0J1, GLGB_ACTP7;  B0BT96, GLGB_ACTPJ;  
A6VP15, GLGB_ACTSZ;  Q8U8L4, GLGB_AGRT5;  Q21WG7, GLGB_ALBFT;  
Q0AA26, GLGB_ALKEH;  Q3M473, GLGB_ANAVT;  O66936, GLGB_AQUAE;  
Q5NXV7, GLGB_AROAE;  Q757Q6, GLGB_ASHGO;  Q96VA4, GLGB_ASPOR;  
C3PCL8, GLGB_BACAA;  C3LC26, GLGB_BACAC;  Q81K82, GLGB_BACAN;  
B7JDF1, GLGB_BACC0;  Q72YJ3, GLGB_BACC1;  B7IM37, GLGB_BACC2;  
C1EX54, GLGB_BACC3;  B7HBC7, GLGB_BACC4;  B7HTX9, GLGB_BACC7;  
P30537, GLGB_BACCL;  A7GUA1, GLGB_BACCN;  B9J2G8, GLGB_BACCQ;  
Q816G6, GLGB_BACCR;  Q632H1, GLGB_BACCZ;  Q6HC15, GLGB_BACHK;  
Q65FS4, GLGB_BACLD;  P39118, GLGB_BACSU;  A9VMV8, GLGB_BACWK;  
Q9RQI5, GLGB_BERDE;  Q8G5L0, GLGB_BIFLO;  Q7WII7, GLGB_BORBR;  
Q7W6L4, GLGB_BORPA;  Q7VYK0, GLGB_BORPE;  Q89FD3, GLGB_BRADU;  
A5EPZ7, GLGB_BRASB;  A4Z005, GLGB_BRASO;  Q1BVW7, GLGB_BURCA;  
A0KDG4, GLGB_BURCH;  Q0B3Y4, GLGB_BURCM;  A3NU16, GLGB_BURP0;  
Q3JTG5, GLGB_BURP1;  A3N8B3, GLGB_BURP6;  Q63T91, GLGB_BURPS;  
Q39N89, GLGB_BURS3;  Q2T6R3, GLGB_BURTA;  A4JR39, GLGB_BURVG;  
Q13S07, GLGB_BURXL;  P30539, GLGB_BUTFI;  Q6FJV0, GLGB_CANGA;  
B3PGN4, GLGB_CELJU;  Q11EX1, GLGB_CHESB;  Q5L6K4, GLGB_CHLAB;  
Q823Y5, GLGB_CHLCV;  Q253M6, GLGB_CHLFF;  Q9PL51, GLGB_CHLMU;  
Q9Z876, GLGB_CHLPN;  B0B998, GLGB_CHLT2;  Q3KKH0, GLGB_CHLTA;  
B0BAX7, GLGB_CHLTB;  O84874, GLGB_CHLTR;  A8AQY3, GLGB_CITK8;  
Q0TQ16, GLGB_CLOP1;  Q6NHR6, GLGB_CORDI;  Q8FQ12, GLGB_COREF;  
Q8NR40, GLGB_CORGL;  Q4JUK5, GLGB_CORJK;  P0CN83, GLGB_CRYNB;  
P0CN82, GLGB_CRYNJ;  Q0K0X8, GLGB_CUPNH;  Q46TF2, GLGB_CUPPJ;  
Q6BXN1, GLGB_DEBHA;  Q47II8, GLGB_DECAR;  Q1IZQ3, GLGB_DEIGD;  
Q9RTB7, GLGB_DEIRA;  Q30Z14, GLGB_DESAG;  Q24VW3, GLGB_DESHY;  
Q729V5, GLGB_DESVH;  A1VC54, GLGB_DESVV;  Q8GQC5, GLGB_DICCH;  
Q555Q9, GLGB_DICDI;  A7ZSW5, GLGB_ECO24;  Q8X6X6, GLGB_ECO57;  
A8A5P2, GLGB_ECOHS;  A1AGW5, GLGB_ECOK1;  Q0TC27, GLGB_ECOL5;  
Q8FCR7, GLGB_ECOL6;  B1IP32, GLGB_ECOLC;  P07762, GLGB_ECOLI;  
Q1R5J4, GLGB_ECOUT;  Q9Y8H3, GLGB_EMENI;  A4WFL5, GLGB_ENT38;  
Q6T308, GLGB_FELCA;  B0TZI5, GLGB_FRAP2;  Q2J6Q9, GLGB_FRASC;  
Q14J36, GLGB_FRAT1;  A7NAI2, GLGB_FRATF;  Q2A4U7, GLGB_FRATH;  
B2SFM7, GLGB_FRATM;  A0Q593, GLGB_FRATN;  Q0BN67, GLGB_FRATO;  
Q5NHN4, GLGB_FRATT;  A4IZK2, GLGB_FRATW;  Q8RF62, GLGB_FUSNN;  
P30538, GLGB_GEOSE;  Q7NL20, GLGB_GLOVI;  Q0BU54, GLGB_GRABC;  
Q4QK67, GLGB_HAEI8;  A5UEJ2, GLGB_HAEIG;  P45177, GLGB_HAEIN;  
B8CVY1, GLGB_HALOH;  Q0I3H7, GLGB_HISS1;  B0UU89, GLGB_HISS2;  
Q6EAS5, GLGB_HORSE;  Q04446, GLGB_HUMAN;  Q28MN2, GLGB_JANSC;  
A6TF51, GLGB_KLEP7;  Q6CX53, GLGB_KLULA;  Q5FL68, GLGB_LACAC;  
Q890J1, GLGB_LACPL;  Q1WSM8, GLGB_LACS1;  Q6AEU4, GLGB_LEIXX;  
Q2W2Q6, GLGB_MAGSA;  Q08047, GLGB_MAIZE;  Q65TI0, GLGB_MANSM;  
A1U0K1, GLGB_MARAV;  Q608L5, GLGB_METCA;  Q1H1K2, GLGB_METFK;  
Q9D6Y9, GLGB_MOUSE;  P59816, GLGB_MYCBO;  A1KIB6, GLGB_MYCBP;  
Q73X75, GLGB_MYCPA;  A0R1Y4, GLGB_MYCS2;  A3Q396, GLGB_MYCSJ;  
A1UJW9, GLGB_MYCSK;  Q1B568, GLGB_MYCSS;  A5U226, GLGB_MYCTA;  
P9WN44, GLGB_MYCTO;  P9WN45, GLGB_MYCTU;  A0PUI6, GLGB_MYCUA;  
Q1D654, GLGB_MYXXD;  Q0AGJ0, GLGB_NITEC;  Q81ZU6, GLGB_NITEU;  
Q1QNB1, GLGB_NITHX;  Q2YB47, GLGB_NITMU;  Q3JCN0, GLGB_NITOC;  
Q3STC2, GLGB_NITWN;  Q5Z0W8, GLGB_NOCFA;  Q8YYX9, GLGB_NOSS1;  
Q2G7S5, GLGB_NOVAD;  Q8CZE8, GLGB_OCEIH;  Q01401, GLGB_ORYSJ;  
Q6MAB4, GLGB_PARUW;  Q9CN94, GLGB_PASMU;  Q6CZK0, GLGB_PECAS;  
Q6LHN1, GLGB_PHOPR;  Q6L2Z9, GLGB_PICTO;  Q6A8Q7, GLGB_PROAC;  
A3PBV8, GLGB_PROM0;  A2C142, GLGB_PROM1;  A8G3V0, GLGB_PROM2;  
A2CAR9, GLGB_PROM3;  A9BAY7, GLGB_PROM4;  A2BVP7, GLGB_PROM5;  
Q31BV0, GLGB_PROM9;  Q7VBL4, GLGB_PROMA;  Q7V8B5, GLGB_PROMM;  
Q7V299, GLGB_PROMP;  A2BQ65, GLGB_PROMS;  Q46LW6, GLGB_PROMT;  
Q48IE2, GLGB_PSE14;  Q15VD0, GLGB_PSEA6;  A6V628, GLGB_PSEA7;  
Q9I1W2, GLGB_PSEAE;  Q4KCQ3, GLGB_PSEF5;  Q3KD78, GLGB_PSEPF;  
Q88FN1, GLGB_PSEPK;  Q881X0, GLGB_PSESM;  Q4ZTJ2, GLGB_PSEU2;  
Q8XT76, GLGB_RALSO;  Q8NKE1, GLGB_RHIID;  Q985P4, GLGB_RHILO;  
Q92M14, GLGB_RHIME;  P52979, GLGB_RHIRD;  Q7UVH1, GLGB_RHOBA;  
Q93HU3, GLGB_RHOMR;  Q2IYX0, GLGB_RHOP2;  Q07K87, GLGB_RHOP5;  
Q6N3P9, GLGB_RHOPA;  Q210H1, GLGB_RHOPB;  Q133N2, GLGB_RHOPS;  
Q2RR72, GLGB_RHORT;  A3PIQ5, GLGB_RHOS1;  Q3J3M6, GLGB_RHOS4;  
Q0SGR9, GLGB_RHOSR;  Q165E2, GLGB_ROSDO;  Q1AZ86, GLGB_RUBXD;  
Q21M30, GLGB_SACD2;  A9MMA0, GLGB_SALAR;  Q57IT8, GLGB_SALCH;  
Q5PM06, GLGB_SALPA;  A9MTV4, GLGB_SALPB;  Q2S4A0, GLGB_SALRD;  
Q8Z235, GLGB_SALTI;  Q8ZLG5, GLGB_SALTY;  A8GKV0, GLGB_SERP5;  
B8EAX1, GLGB_SHEB2;  A3D286, GLGB_SHEB5;  A6WKY2, GLGB_SHEB8;  
A9KTJ1, GLGB_SHEB9;  Q081Q4, GLGB_SHEFN;  Q8EGU7, GLGB_SHEON;  
A4Y4U3, GLGB_SHEPC;  Q0HGI8, GLGB_SHESM;  Q0HST5, GLGB_SHESR;  
A1RLX8, GLGB_SHESW;  Q31VJ1, GLGB_SHIBS;  Q32AV3, GLGB_SHIDS;  
Q0SZN2, GLGB_SHIF8;  Q83PV3, GLGB_SHIFL;  Q3YW93, GLGB_SHISS;  
P30924, GLGB_SOLTU;  Q3K1K5, GLGB_STRA1;  Q8E5V8, GLGB_STRA3;  
Q8E081, GLGB_STRA5;  P52980, GLGB_STRAU;  A8AYH3, GLGB_STRGC;  
Q8DT52, GLGB_STRMU;  Q04KG8, GLGB_STRP2;  Q97QS8, GLGB_STRPN;  
Q8DPS6, GLGB_STRR6;  A3CM01, GLGB_STRSV;  P16954, GLGB_SYNE7;  
Q2JT08, GLGB_SYNJA;  Q2JK68, GLGB_SYNJB;  Q5N4W5, GLGB_SYNP6;  
A5GJR7, GLGB_SYNPW;  Q7U646, GLGB_SYNPX;  A5GSG4, GLGB_SYNR3;  
Q0I8Y2, GLGB_SYNS3;  Q3AYE2, GLGB_SYNS9;  Q3AKV6, GLGB_SYNSC;  
P52981, GLGB_SYNY3;  Q8DLB8, GLGB_THEEB;  Q47SE7, GLGB_THEFY;  
Q31IB6, GLGB_THICR;  Q3SH78, GLGB_THIDA;  Q114I1, GLGB_TRIEI;  
Q9KNE8, GLGB_VIBCH;  Q5DZB8, GLGB_VIBF1;  Q87FR0, GLGB_VIBPA;  
Q8D4P0, GLGB_VIBVU;  Q7MG90, GLGB_VIBVY;  Q6CCT1, GLGB_YARLI;  
P32775, GLGB_YEAST;  A1JSJ0, GLGB_YERE8;  A7FNX5, GLGB_YERP3;  
Q1C1D9, GLGB_YERPA;  Q8ZA75, GLGB_YERPE;  Q1CDL3, GLGB_YERPN;  
A4TQV2, GLGB_YERPP;  Q664I2, GLGB_YERPS;  

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All ENZYME / UniProtKB/Swiss-Prot entries corresponding to 2.4.1.-
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