3UA0

Chains	Family Name	Domain Identifier	Architecture	Possible Homology	Homology	Topology	Family	Provenance Source (Version)
A	UNK_F_TYPE	e3ua0A1	A: beta duplicates or obligate multimers	X: Fibroin heavy chain N-terminal domain (From Topology)	H: Fibroin heavy chain N-terminal domain (From Topology)	T: Fibroin heavy chain N-terminal domain	F: UNK_F_TYPE	ECOD (1.6)
B	UNK_F_TYPE	e3ua0B1	A: beta duplicates or obligate multimers	X: Fibroin heavy chain N-terminal domain (From Topology)	H: Fibroin heavy chain N-terminal domain (From Topology)	T: Fibroin heavy chain N-terminal domain	F: UNK_F_TYPE	ECOD (1.6)

Chain	Domain	Class	Architecture	Topology	Homology	Provenance Source (Version)
A	6.20.280.10	Special	Other non-globular	Pantoate--beta-alanine Ligase	Chain: A,domain 2	CATH (4.3.0)
B	6.20.280.10	Special	Other non-globular	Pantoate--beta-alanine Ligase	Chain: A,domain 2	CATH (4.3.0)

Chains	Accession	Name	Description	Comments	Source
A, B	PF20820	Fibroin heavy chain, N-terminal domain (Fib-H_N)	Fibroin heavy chain, N-terminal domain	This domain is found at the N-terminal end of Fibroin heavy chain (Fib-H) from Bombyx mori and similar proteins mainly from arthropods and bacteria. This hydrophilic region plays an important role in the assembly of silk by changing its conformation ...	This domain is found at the N-terminal end of Fibroin heavy chain (Fib-H) from Bombyx mori and similar proteins mainly from arthropods and bacteria. This hydrophilic region plays an important role in the assembly of silk by changing its conformation in response to pH decreases: it transitions from random coil to beta sheets and form micelle-like oligomers at around pH 6.0 [1].	Domain

Chains	Accession	Name	Type
A, B	IPR052258	Diverse Functionality Domain-containing Protein	Family
A, B	IPR049376	Fibroin heavy chain, N-terminal domain superfamily	Homologous Superfamily
A, B	IPR049375	Fibroin heavy chain, N-terminal domain	Domain