Mechanism	Retaining a
Clan	GH-T
3D Structure Status	( β / α ) 7 barrel
Catalytic Nucleophile/Base	Glu
Catalytic Proton Donor	Asp
Note	Subfamilies established in (Polacek et al., 2025) [PMID:40187459]
External resources	CAZypedia;
Statistics	GenBank accession (821); Uniprot accession (12); PDB accession (20); 3D entries (1); cryst (0)

Archaea
Protein Name	EC#	Reference	Organism	GenBank	Uniprot	PDB/3D	Subf
amylopullulanase (Pcal-apu; Pcal_1616)	3.2.1.1 3.2.1.41	URL URL	Pyrobaculum calidifontis JCM 11548	ABO09033.1	A3MWL6		2
amylopullulanase (Apu; PFAPU; Apu-Pf; PF1935; PF1935*) (Amy57B)	3.2.1.1 3.2.1.41	pubmed pubmed	Pyrococcus furiosus DSM 3638	AAL82059.1 AAB71229.1 ABA33719.1 NP_579664.1	O30772 Q3HUR3 Q8TZQ1		2
amylopullulanase (PulPY; PYCH_17120)	3.2.1.1 3.2.1.41	pubmed pubmed	Pyrococcus yayanosii CH1	AEH25371.1	F8AHK0		2
amylopullulanase (ApuA)	3.2.1.1 3.2.1.41	pubmed pubmed	Thermococcus hydrothermalis AL662	AAD28552.1	Q9Y8I8		2
amylopullulanase (Apu-Tk; TK1774)	3.2.1.1 3.2.1.41	doi doi	Thermococcus kodakarensis KOD1	BAD85963.1 CAT69104.1	Q5JJ55		2
amylopullulanase (Apu; TLAPU)	3.2.1.1 3.2.1.41	pubmed pubmed	Thermococcus litoralis	BAC10983.1	Q8NKS8		2
amylopullulanase (TsiApu; Apu-Ts)	3.2.1.1 3.2.1.41	pubmed pubmed	Thermococcus sp. HJ21	ACJ03924.1	B6SED6		2
Bacteria
Protein Name	EC#	Reference	Organism	GenBank	Uniprot	PDB/3D	Subf
amylopullulanase (AaApu; APU_Aquae; Aq_720)	3.2.1.1 3.2.1.41	doi doi	Aquifex aeolicus VF5	AAC06900.1 NP_213494.1 WP_010880432.1	O66934	8ZYI[A,B] 9IHT[A,B] 9IHU[A,B] 9IHV[A,B] 9IHW[A,B] 9IHX[A,B] 9II0[A,B] 9II1[A,B] 9JLQ[A,B,C,D] 9JLR[A,B,C,D] 9JLS[A,B,C,D] 9JLT[A,B] 9JLU[A] 9JLV[A] 9JLW[A,B] 9K7C[A,B,C,D] 9K7D[A,B] 9KYP[A,B,C,D] 9KYQ[A,B] 9KYR[A,B,C,D]	2
amylopullulanase (Apu; CEApu; CSE_07380)	3.2.1.1 3.2.1.41	doi doi	Caldisericum exile AZM16c01	BAL80864.1	A0A7U6GEE7		2
pullulanase (Dtur_0675)	3.2.1.41	pubmed	Dictyoglomus turgidum DSM 6724	ACK41960.1	B8DZM7		2
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