GO_REF:0000120 supplied the plasma membrane GOA annotation reviewed in this file.

GO_REF:0000122 supplied the extracellular-region annotation judged incorrect here.

CASPL1B1 is a multi-pass cell-membrane CASP-like protein of the Casparian strip membrane proteins family.

GOA supplied the plasma membrane, protein binding and extracellular-region annotations reviewed in this file.

Synthesizes the literature placing CASPL1B1 in suberized endodermal cells, interacting with PIP2;1, with no whole-root hydraulic phenotype and functional redundancy with other CASPLs in the caspQ background.

CASPL1B1 is exclusively expressed in suberized endodermal cells and physically interacts with the aquaporin PIP2;1, potentially influencing its phosphorylated form; CASPL loss of function does not alter whole-root hydraulic conductivity.

Source of the binary Y2H protein-binding annotation; reports a CASPL1B1-NAC089 interaction within a genome-scale interactome.

Defines the CASP/CASPL family and the unified nomenclature placing CASPL1B1 in the divergent CASP-like subfamily; family members are plasma-membrane tetraspan scaffolds.

Places CASPL1B1 in the CASPL1 clade; it is up-regulated in myb36 and after CIF2, but higher-order knockout of six endodermis CASPLs including CASPL1B1 in the caspQ background does not worsen the Casparian strip barrier, indicating redundancy / non-essential role in strip assembly.