Annotations: 7U02

Chains	Family Name	Domain Identifier	Architecture	Possible Homology	Homology	Topology	Family	Provenance Source (Version)
A [auth B]	PF13280	e7u02B2	A: beta barrels	X: SH3	H: Central WYL domain of RspWYL1 (From Topology)	T: Central WYL domain of RspWYL1	F: PF13280	ECOD (1.6)
A [auth B]	PF13280	e7u02B1	A: a+b two layers	X: Alpha-beta plaits	H: RspWYL1 C-terminal domain (From Topology)	T: RspWYL1 C-terminal domain	F: PF13280	ECOD (1.6)
C [auth M]	PF13280	e7u02M2	A: beta barrels	X: SH3	H: Central WYL domain of RspWYL1 (From Topology)	T: Central WYL domain of RspWYL1	F: PF13280	ECOD (1.6)
C [auth M]	PF13280	e7u02M1	A: a+b two layers	X: Alpha-beta plaits	H: RspWYL1 C-terminal domain (From Topology)	T: RspWYL1 C-terminal domain	F: PF13280	ECOD (1.6)

Chains	Accession	Name	Description	Comments	Source
A [auth B], C [auth M]	PF13280	WYL domain (WYL)	WYL domain	WYL is a Sm-like SH3 beta-barrel fold containing domain. It is a member of the WYL-like superfamily, named for three conserved amino acids found in a subset of the superfamily. However, these residues are not strongly conserved throughout the fami ...	WYL is a Sm-like SH3 beta-barrel fold containing domain. It is a member of the WYL-like superfamily, named for three conserved amino acids found in a subset of the superfamily. However, these residues are not strongly conserved throughout the family. Rather, the conservation pattern includes four basic residues and a position often occupied by a cysteine [1], which are predicted to line a ligand-binding groove typical of the Sm-like SH3 beta-barrels. A WYL domain protein (sll7009) is a negative regulator of the I-D CRISPR-Cas system in Synechocystis sp [2]. It is predicted to be a ligand-sensing domain that could bind negatively charged ligands, such as nucleotides or nucleic acid fragments, to regulate CRISPR-Cas and other defense systems such as the abortive infection AbiG system.	Domain