1KXT | pdb_00001kxt

Camelid VHH Domains in Complex with Porcine Pancreatic alpha-Amylase

External Resource: Annotation

Domain Annotation: SCOP/SCOPe Classification
Domain Annotation: SCOP2 Classification
Domain Annotation: ECOD Classification
Domain Annotation: CATH
IMGT Antibody Annotation
SAbDab Antibody Annotation
Protein Family Annotation
Gene Ontology: Gene Product Annotation
InterPro: Protein Family Classification

Domain Annotation: SCOP/SCOPe Classification SCOP-e Database Homepage

Chains	Domain Info	Class	Fold	Superfamily	Family	Domain	Species	Provenance Source (Version)
A	d1kxta1	All beta proteins	Glycosyl hydrolase domain	Glycosyl hydrolase domain	alpha-Amylases, C-terminal beta-sheet domain	Animal alpha-amylase	(Sus scrofa ) [TaxId: 9823 ],	SCOPe (2.08)
A	d1kxta2	Alpha and beta proteins (a/b)	TIM beta/alpha-barrel	(Trans)glycosidases	Amylase, catalytic domain	Animal alpha-amylase	(Sus scrofa ) [TaxId: 9823 ],	SCOPe (2.08)
C	d1kxtc1	All beta proteins	Glycosyl hydrolase domain	Glycosyl hydrolase domain	alpha-Amylases, C-terminal beta-sheet domain	Animal alpha-amylase	(Sus scrofa ) [TaxId: 9823 ],	SCOPe (2.08)
C	d1kxtc2	Alpha and beta proteins (a/b)	TIM beta/alpha-barrel	(Trans)glycosidases	Amylase, catalytic domain	Animal alpha-amylase	(Sus scrofa ) [TaxId: 9823 ],	SCOPe (2.08)
E	d1kxte1	All beta proteins	Glycosyl hydrolase domain	Glycosyl hydrolase domain	alpha-Amylases, C-terminal beta-sheet domain	Animal alpha-amylase	(Sus scrofa ) [TaxId: 9823 ],	SCOPe (2.08)
E	d1kxte2	Alpha and beta proteins (a/b)	TIM beta/alpha-barrel	(Trans)glycosidases	Amylase, catalytic domain	Animal alpha-amylase	(Sus scrofa ) [TaxId: 9823 ],	SCOPe (2.08)
B	d1kxtb_	All beta proteins	Immunoglobulin-like beta-sandwich	Immunoglobulin	V set domains (antibody variable domain-like)	Camelid IG heavy chain variable domain, VHh	Arabian camel (Camelus dromedarius ) [TaxId: 9838 ],	SCOPe (2.08)
D	d1kxtd_	All beta proteins	Immunoglobulin-like beta-sandwich	Immunoglobulin	V set domains (antibody variable domain-like)	Camelid IG heavy chain variable domain, VHh	Arabian camel (Camelus dromedarius ) [TaxId: 9838 ],	SCOPe (2.08)
F	d1kxtf_	All beta proteins	Immunoglobulin-like beta-sandwich	Immunoglobulin	V set domains (antibody variable domain-like)	Camelid IG heavy chain variable domain, VHh	Arabian camel (Camelus dromedarius ) [TaxId: 9838 ],	SCOPe (2.08)

Domain Annotation: SCOP2 Classification SCOP2 Database Homepage

Chains	Type	Family Name	Domain Identifier	Family Identifier	Provenance Source (Version)
A	SCOP2B Superfamily	(Trans)glycosidases	8033369	3000313	SCOP2B (2022-06-29)
A	SCOP2B Superfamily	Glycosyl hydrolase domain-like	8033366	3001528	SCOP2B (2022-06-29)
C	SCOP2B Superfamily	Glycosyl hydrolase domain-like	8033366	3001528	SCOP2B (2022-06-29)
C	SCOP2B Superfamily	(Trans)glycosidases	8033369	3000313	SCOP2B (2022-06-29)
E	SCOP2B Superfamily	(Trans)glycosidases	8033369	3000313	SCOP2B (2022-06-29)
E	SCOP2B Superfamily	Glycosyl hydrolase domain-like	8033366	3001528	SCOP2B (2022-06-29)

Domain Annotation: ECOD Classification ECOD Database Homepage

Chains	Family Name	Domain Identifier	Architecture	Possible Homology	Homology	Topology	Family	Provenance Source (Version)
A	Alpha-L-AF_C	e1kxtA1	A: alpha bundles	X: Cloacin translocation domain	H: beta-Prism I	T: beta-Prism I	F: Alpha-L-AF_C	ECOD (develop294)
A	Alpha-amylase	e1kxtA2	A: alpha bundles	X: HTH	H: HTH	T: winged helix domain	F: Alpha-amylase	ECOD (develop294)
C	Alpha-L-AF_C	e1kxtC1	A: alpha bundles	X: Cloacin translocation domain	H: beta-Prism I	T: beta-Prism I	F: Alpha-L-AF_C	ECOD (develop294)
C	Alpha-amylase	e1kxtC2	A: alpha bundles	X: HTH	H: HTH	T: winged helix domain	F: Alpha-amylase	ECOD (develop294)
E	Alpha-L-AF_C	e1kxtE1	A: alpha bundles	X: Cloacin translocation domain	H: beta-Prism I	T: beta-Prism I	F: Alpha-L-AF_C	ECOD (develop294)
E	Alpha-amylase	e1kxtE2	A: alpha bundles	X: HTH	H: HTH	T: winged helix domain	F: Alpha-amylase	ECOD (develop294)
B	Copper-bind	e1kxtB1	A: alpha bundles	X: Cloacin translocation domain	H: beta-Prism I	T: beta-Prism I	F: Copper-bind	ECOD (develop294)
D	Copper-bind	e1kxtD1	A: alpha bundles	X: Cloacin translocation domain	H: beta-Prism I	T: beta-Prism I	F: Copper-bind	ECOD (develop294)
F	Copper-bind	e1kxtF1	A: alpha bundles	X: Cloacin translocation domain	H: beta-Prism I	T: beta-Prism I	F: Copper-bind	ECOD (develop294)

Domain Annotation: CATH CATH Database Homepage

Chain	Domain	Class	Architecture	Topology	Homology	Provenance Source (Version)
A	3.20.20.80	Alpha Beta	Alpha-Beta Barrel	TIM Barrel	Glycosidases	CATH (4.3.0)
A	2.60.40.1180	Mainly Beta	Sandwich	Immunoglobulin-like	Golgi alpha-mannosidase II	CATH (4.3.0)
C	3.20.20.80	Alpha Beta	Alpha-Beta Barrel	TIM Barrel	Glycosidases	CATH (4.3.0)
C	2.60.40.1180	Mainly Beta	Sandwich	Immunoglobulin-like	Golgi alpha-mannosidase II	CATH (4.3.0)
E	3.20.20.80	Alpha Beta	Alpha-Beta Barrel	TIM Barrel	Glycosidases	CATH (4.3.0)
E	2.60.40.1180	Mainly Beta	Sandwich	Immunoglobulin-like	Golgi alpha-mannosidase II	CATH (4.3.0)
B	2.60.40.10	Mainly Beta	Sandwich	Immunoglobulin-like	Immunoglobulins	CATH (4.3.0)
D	2.60.40.10	Mainly Beta	Sandwich	Immunoglobulin-like	Immunoglobulins	CATH (4.3.0)
F	2.60.40.10	Mainly Beta	Sandwich	Immunoglobulin-like	Immunoglobulins	CATH (4.3.0)

IMGT Antibody Annotation IMGT Database Homepage

Chain	Protein Name	Description	Organism Name	Gene Allele Name(s)	Domain Name(s)	Receptor Type	Receptor Description	Provenance Source
B, D, F	Immunoglobulin Vhh Fragment	VH	Camelus dromedarius (Arabian camel)	IGHV3S7201, IGHJ401	V-DOMAIN VH	IG	(VH)	IMGT (202610-0)

SAbDab Antibody Annotation SAbDab Database Homepage

Chain	Chain Class	Chain Subclass	Chain Type	Antigen Name(s)	Provenance Source
B, D, F	Heavy Chain	IGHV1	-	alpha-amylase, pancreatic	SAbDab (2026-03-20)

Protein Family Annotation Pfam Database Homepage

Chains	Accession	Name	Description	Comments	Source
A, C, E	PF00128	Alpha amylase, catalytic domain (Alpha-amylase)	Alpha amylase, catalytic domain	Alpha amylase is classified as family 13 of the glycosyl hydrolases. The structure is an 8 stranded alpha/beta barrel containing the active site, interrupted by a ~70 a.a. calcium-binding domain protruding between beta strand 3 and alpha helix 3, a ...	Alpha amylase is classified as family 13 of the glycosyl hydrolases. The structure is an 8 stranded alpha/beta barrel containing the active site, interrupted by a ~70 a.a. calcium-binding domain protruding between beta strand 3 and alpha helix 3, and a carboxyl-terminal Greek key beta-barrel domain.	Domain
A, C, E	PF02806	Alpha amylase, C-terminal all-beta domain (Alpha-amylase_C)	Alpha amylase, C-terminal all-beta domain	Alpha amylase is classified as family 13 of the glycosyl hydrolases. The structure is an 8 stranded alpha/beta barrel containing the active site, interrupted by a ~70 a.a. calcium-binding domain protruding between beta strand 3 and alpha helix 3, a ...	Alpha amylase is classified as family 13 of the glycosyl hydrolases. The structure is an 8 stranded alpha/beta barrel containing the active site, interrupted by a ~70 a.a. calcium-binding domain protruding between beta strand 3 and alpha helix 3, and a carboxyl-terminal Greek key beta-barrel domain.	Domain

Gene Ontology: Gene Product Annotation Gene Ontology Database Homepage

Chains	Polymer	Molecular Function	Biological Process	Cellular Component
A, C, E	ALPHA-AMYLASE, PANCREATIC	cation binding ion binding binding calcium ion binding metal ion binding small molecule binding hydrolase activity, acting on glycosyl bonds amylase activity alpha-amylase activity hydrolase activity, hydrolyzing O-glycosyl compounds hydrolase activity catalytic activity anion binding chloride ion binding	carbohydrate metabolic process catabolic process carbohydrate catabolic process primary metabolic process metabolic process cellular process	cellular anatomical structure extracellular region extracellular space
B, D, F	IMMUNOGLOBULIN VHH FRAGMENT	-	-	-

InterPro: Protein Family Classification InterPro Database Homepage

Chains	Accession	Name	Type
A, C, E	IPR006048	Alpha-amylase/branching enzyme, C-terminal all beta	Domain
A, C, E	IPR031319	Alpha-amylase, C-terminal domain	Domain
A, C, E	IPR017853	Glycoside hydrolase superfamily	Homologous Superfamily
A, C, E	IPR006047	Glycosyl hydrolase family 13, catalytic domain	Domain
A, C, E	IPR006046	Alpha amylase	Family
A, C, E	IPR013780	Glycosyl hydrolase, all-beta	Homologous Superfamily

RCSB PDB Core Operations are funded by the U.S. National Science Foundation (DBI-2321666), the US Department of Energy (DE-SC0019749), and the National Cancer Institute, National Institute of Allergy and Infectious Diseases, and National Institute of General Medical Sciences of the National Institutes of Health under grant R01GM157729. RCSB PDB uses resources of the National Energy Research Scientific Computing Center (NERSC), a Department of Energy User Facility.