2K3Q

Chains	Type	Family Name	Domain Identifier	Family Identifier	Provenance Source (Version)
A	SCOP2 Family	NTD of spidroin-like	8046116	4004885	SCOP2 (2022-06-29)
A	SCOP2 Superfamily	NTD of spidroin-like	8052368	3002108	SCOP2 (2022-06-29)

Chains	Family Name	Domain Identifier	Architecture	Possible Homology	Homology	Topology	Family	Provenance Source (Version)
A	Spidroin_N_1	e2k3qA1	A: alpha arrays	X: PWI domain-like	H: N-terminal domain of egg case silk protein TuSp1 (From Topology)	T: N-terminal domain of egg case silk protein TuSp1	F: Spidroin_N_1	ECOD (1.6)

Chain	Domain	Class	Architecture	Topology	Homology	Provenance Source (Version)
A	1.10.274.70	Mainly Alpha	Orthogonal Bundle	Enzyme I	Chain A, domain 2	CATH (4.3.0)

Chains	Accession	Name	Description	Comments	Source
A	PF16763	Major ampullate spidroin 1, spider silk protein 1, N-term (Spidroin_N)	Major ampullate spidroin 1, spider silk protein 1, N-term	Spidroin is produced by a number of arachnids. Spidrions are made up of repetitive segments flanked by conserved non-repetitive domains, and this domain is the conserved non-repetitive region. Aggregation to form the rigid silk occurs due to associat ...	Spidroin is produced by a number of arachnids. Spidrions are made up of repetitive segments flanked by conserved non-repetitive domains, and this domain is the conserved non-repetitive region. Aggregation to form the rigid silk occurs due to association at the repetitive regions, and the N-terminal domain is necessary to prevent premature aggregation during storage before extrusion. This N_terminal region inhibits precocious aggregation and then accelerates and directs self-assembly as the pH is lowered along the extrusion duct [1].	Domain