1USK

L-leucine-binding protein with leucine bound

External Resource: Annotation

Domain Annotation: SCOP/SCOPe Classification
Domain Annotation: SCOP2 Classification
Domain Annotation: ECOD Classification
Domain Annotation: CATH
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	d1uska_	Alpha and beta proteins (a/b)	Periplasmic binding protein-like I	Periplasmic binding protein-like I	L-arabinose binding protein-like	Leucine-binding protein	(Escherichia coli ) [TaxId: 562 ],	SCOPe (2.08)
B	d1uskb_	Alpha and beta proteins (a/b)	Periplasmic binding protein-like I	Periplasmic binding protein-like I	L-arabinose binding protein-like	Leucine-binding protein	(Escherichia coli ) [TaxId: 562 ],	SCOPe (2.08)
C	d1uskc_	Alpha and beta proteins (a/b)	Periplasmic binding protein-like I	Periplasmic binding protein-like I	L-arabinose binding protein-like	Leucine-binding protein	(Escherichia coli ) [TaxId: 562 ],	SCOPe (2.08)
D	d1uskd_	Alpha and beta proteins (a/b)	Periplasmic binding protein-like I	Periplasmic binding protein-like I	L-arabinose binding protein-like	Leucine-binding protein	(Escherichia coli ) [TaxId: 562 ],	SCOPe (2.08)

Domain Annotation: SCOP2 Classification SCOP2 Database Homepage

Chains	Type	Family Name	Domain Identifier	Family Identifier	Provenance Source (Version)
A	SCOP2B Superfamily	Type 1 solute binding protein-like	8041997	3000125	SCOP2B (2022-06-29)
B	SCOP2B Superfamily	Type 1 solute binding protein-like	8041997	3000125	SCOP2B (2022-06-29)
C	SCOP2B Superfamily	Type 1 solute binding protein-like	8041997	3000125	SCOP2B (2022-06-29)
D	SCOP2B Superfamily	Type 1 solute binding protein-like	8041997	3000125	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	PF13458	e1uskA2	A: a/b three-layered sandwiches	X: Flavodoxin-like	H: Class I glutamine amidotransferase-like	T: Periplasmic binding protein-like I	F: PF13458	ECOD (1.6)
B	PF13458	e1uskB2	A: a/b three-layered sandwiches	X: Flavodoxin-like	H: Class I glutamine amidotransferase-like	T: Periplasmic binding protein-like I	F: PF13458	ECOD (1.6)
C	PF13458	e1uskC2	A: a/b three-layered sandwiches	X: Flavodoxin-like	H: Class I glutamine amidotransferase-like	T: Periplasmic binding protein-like I	F: PF13458	ECOD (1.6)
D	PF13458	e1uskD2	A: a/b three-layered sandwiches	X: Flavodoxin-like	H: Class I glutamine amidotransferase-like	T: Periplasmic binding protein-like I	F: PF13458	ECOD (1.6)

Domain Annotation: CATH CATH Database Homepage

Chain	Domain	Class	Architecture	Topology	Homology	Provenance Source (Version)
A	3.40.50.2300	Alpha Beta	3-Layer(aba) Sandwich	Rossmann fold	Response regulator	CATH (4.3.0)
B	3.40.50.2300	Alpha Beta	3-Layer(aba) Sandwich	Rossmann fold	Response regulator	CATH (4.3.0)
C	3.40.50.2300	Alpha Beta	3-Layer(aba) Sandwich	Rossmann fold	Response regulator	CATH (4.3.0)
D	3.40.50.2300	Alpha Beta	3-Layer(aba) Sandwich	Rossmann fold	Response regulator	CATH (4.3.0)

Protein Family Annotation Pfam Database Homepage

Chains	Accession	Name	Description	Comments	Source
A, B, C, D	PF13458	Periplasmic binding protein (Peripla_BP_6)	Periplasmic binding protein	-	Family

Gene Ontology: Gene Product Annotation Gene Ontology Database Homepage

Chains	Polymer	Molecular Function	Biological Process	Cellular Component
A, B, C, D	LEUCINE-SPECIFIC BINDING PROTEIN	cation binding organic acid binding binding ion binding anion binding L-leucine binding amino acid binding carboxylic acid binding small molecule binding	organic acid transport localization nitrogen compound transport organic anion transport carboxylic acid transport transport branched-chain amino acid transport organic substance transport establishment of localization phenylalanine transport neutral amino acid transport L-amino acid transport L-leucine transport organic cation transport organic acid transport localization nitrogen compound transport organic anion transport carboxylic acid transport transport branched-chain amino acid transport organic substance transport establishment of localization phenylalanine transport neutral amino acid transport L-amino acid transport L-leucine transport organic cation transport amino acid transport	ATPase dependent transmembrane transport complex ATP-binding cassette (ABC) transporter complex, substrate-binding subunit-containing protein-containing complex plasma membrane protein complex membrane plasma membrane membrane protein complex cellular anatomical entity transporter complex ATP-binding cassette (ABC) transporter complex cell periphery transmembrane transporter complex outer membrane-bounded periplasmic space cell envelope ATPase dependent transmembrane transport complex ATP-binding cassette (ABC) transporter complex, substrate-binding subunit-containing protein-containing complex plasma membrane protein complex membrane plasma membrane membrane protein complex cellular anatomical entity transporter complex ATP-binding cassette (ABC) transporter complex cell periphery transmembrane transporter complex outer membrane-bounded periplasmic space cell envelope periplasmic space

InterPro: Protein Family Classification InterPro Database Homepage

Chains	Accession	Name	Type
A, B, C, D	IPR028081	Leucine-binding protein domain	Domain
A, B, C, D	IPR028082	Periplasmic binding protein-like I	Homologous Superfamily
A, B, C, D	IPR000709	Leu/Ile/Val-binding protein	Family

RCSB PDB Core Operations are funded by the National Science Foundation (DBI-1832184), 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 R01GM133198.