Crystal structures of receptors involved in small molecule transport across membranes.
Eur J Cell Biol
; 91(4): 318-25, 2012 Apr.
Article
in En
| MEDLINE
| ID: mdl-22341528
This paper briefly reviews contemporary protein crystallography and focuses on six receptor proteins of membrane-intrinsic ATP binding cassette (ABC) transporters. Three of these receptors are specific for carbohydrates and three for amino acids. The receptor GacH of the transporter GacFGH from Streptomyces glaucescens is specific for acarbose and its homologs, and MalE of Salmonella typhimurium is specific for maltose but also forms a complex with acarbose, and the third receptor is the highly specific d-galactose receptor AcbH of the transporter AcbFGH from Actinoplanes sp. Concerning the receptors for amino acids, ArtJ belongs to the ArtJ-(MP)(2) transporter of Geobacillus stearotermophilus and recognizes and binds to positively charged arginine, lysine, and histidine with different sizes of side chains, contrasting the receptors Ngo0372 and Ngo2014 from Neisseria gonorrhaeae that are highly specific for cystine and cysteine, respectively. The differences in the rather unspecific receptors GacH, MalE and ArtJ are compared with the highly specific receptors AcbH, Ngo0372 and Ngo2014.
Full text:
1
Collection:
01-internacional
Database:
MEDLINE
Main subject:
Bacterial Proteins
/
Crystallography, X-Ray
/
ATP-Binding Cassette Transporters
Language:
En
Journal:
Eur J Cell Biol
Year:
2012
Document type:
Article
Affiliation country:
Country of publication: