NCBI Accession #
NP_200037.1
NCBI GenBank Nucleotide #
NM_124603.4
NCBI Official Full Name
membrane steroid binding protein 1
NCBI Official Symbol
MSBP1
NCBI Official Synonym Symbols
ARABIDOPSIS THALIANA MEMBRANE-ASSOCIATED PROGESTERONE BINDING PROTEIN 5; AtMAPR5; ATMP1; F17P19.14; F17P19_14; membrane steroid binding protein 1
NCBI Protein Information
membrane steroid binding protein 1
NCBI Summary
Encodes a protein with similarity to progesterone-binding proteins in animals. Has been shown to bind steroids in vitro. Expressed in aerial portions of the plant excluding mature flowers and siliques. Antisense experiments suggest a role in inhibition of hypocotyl cell elongation. Expression is suppressed light grown seedlings transferred to the dark.
UniProt Synonym Gene Names
; AtMAPR5
UniProt Protein Name
Membrane steroid-binding protein 1
UniProt Synonym Protein Names
Membrane-associated progesterone-binding protein 5
UniProt Primary Accession #
Q9XFM6
UniProt Secondary Accession #
Q9LTJ7
UniProt Related Accession #
Q9XFM6
UniProt Comments
MSBP1 can bind to multiple steroid compounds with different affinities. Negatively regulates cell elongation and brassinosteroid signaling. May act as a coreceptor with BAK1 and enhances its endocytosis.