Medical Subject Headings

Last uploaded: March 22, 2026
Id http://purl.bioontology.org/ontology/MESH/D018435
http://purl.bioontology.org/ontology/MESH/D018435
Preferred Name

ATP Binding Cassette Transporter, Subfamily B

Definitions
A subfamily of transmembrane proteins from the superfamily of ATP-BINDING CASSETTE TRANSPORTERS that are closely related in sequence to ATP BINDING CASSETTE TRANSPORTER, SUBFAMILY B, MEMBER 1. When overexpressed, they function as ATP-dependent efflux pumps able to extrude lipophilic drugs (especially ANTINEOPLASTIC AGENTS) from cells, causing multidrug resistance (DRUG RESISTANCE, MULTIPLE). Although ATP BINDING CASSETTE TRANSPORTER, SUBFAMILY B share functional similarities to ATP-BINDING CASSETTE, SUB-FAMILY C PROTEINS they are two distinct subclasses of ATP-BINDING CASSETTE TRANSPORTERS, and have little sequence homology.
Synonyms
ATP Binding Cassette Transporter, Sub Family B
ATP Binding Cassette Transporter, Sub-Family B
P Glycoproteins
P-Glycoproteins
ATP-Binding Cassette, Sub-Family B Proteins
Multidrug Resistance Proteins
ATP Binding Cassette, Sub Family B Proteins
Type http://www.w3.org/2002/07/owl#Class
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