Rapid separation of Escherichia coli 30S ribosomal proteins by fast protein liquid chromatography (FPLC)

Biochimie ◽  
1986 ◽  
Vol 68 (4) ◽  
pp. 587-591 ◽  
Author(s):  
Patrick Stiegler ◽  
Marie-Lóuise Hartmann ◽  
Jean-Pierre Ebel
1983 ◽  
Vol 29 (9) ◽  
pp. 1635-1640 ◽  
Author(s):  
E H Cooper ◽  
R Turner ◽  
E A Johns ◽  
H Lindblom ◽  
V J Britton

Abstract Fast Protein Liquid Chromatography TM (FPLC), in which an anion-exchange column is used, provides rapid separation and reproducible profiling of the plasma proteins in urine and cerebrospinal fluid (CSF). Chromatographic separation of the proteins takes 1 h for urine specimens and 45 min for CSF. The elution sequence from the anion-exchange column is similar to the electrophoretic mobility. Individual proteins have the same retention times independently of which type of specimen is used. The elution characteristics of 21 plasma proteins have been identified. We illustrated some applications of this system, including the profiling of tubular protein-uria, the isolation of Bence Jones proteins from urine, and the investigation of hemoglobin-derived products in the CSF.


1987 ◽  
Vol 393 (2) ◽  
pp. 462-465 ◽  
Author(s):  
Yu.A. Motorin ◽  
A.D. Wolfson ◽  
A.Yu. Tsygankov ◽  
A.F. Orlovsky

Agrociencia ◽  
2021 ◽  
Vol 55 (4) ◽  
pp. 317-329
Author(s):  
Martín Barbosa Amezcua ◽  
Luz Vázquez Moreno ◽  
Laura González Dávalos ◽  
Armando Shimada ◽  
Ofelia Mora

Los forrajes utilizados en la producción de ganado bovino en el trópico tienen altos niveles de β-caroteno, que produce canales con grasa de color amarillo y demerita su valor económico. La pigmentación amarilla se debe a la actividad baja de la enzima β -caroteno 15,15’-monooxigenasa (BCMO1) en el intestino delgado e hígado. Un uso biotecnológico de esta enzima podría escindir al β -caroteno en dos moléculas de retinal, eliminar la fuente de coloración y optimizar el valor comercial de la carne del ganado bovino alimentado en pastoreo. El objetivo de este estudio fue obtener una enzima BCMO1 recombinante con actividad similar a las enzimas nativas, a partir de bacterias transformadas con el gen que codifica la b-caroteno 15,15’-monooxigenasa de Gallus gallus (gBCMO1). La enzima se obtuvo por sobre expresión a partir de una Escherichia coli XL1-Blue transformada con dicho gen, y se purificó por Cromatografía rápida de proteína líquida (Fast Protein Liquid Chromatography, FPLC); se midió la actividad in vitro del proceso por Cromatografía de afinidad por metales inmovilizados (Immobilized Metal Affinity Chromatography, IMAC) y el producto final se detectó por Cromatografía de líquidos de polaridad alta (High Polarity Liquid Chromatography, HPLC). Una proteína de aproximadamente 63 kDa se obtuvo, la cual presentó una actividad enzimática de 2993 (± 108.2) pmol mg-1 de proteína h-1 (n=3). La proteína aislada se puede evaluar como aditivo en estudios in vitro con el fin de disminuir la coloración amarilla de las canales de bovinos.


Author(s):  
G. Stöffler ◽  
R.W. Bald ◽  
J. Dieckhoff ◽  
H. Eckhard ◽  
R. Lührmann ◽  
...  

A central step towards an understanding of the structure and function of the Escherichia coli ribosome, a large multicomponent assembly, is the elucidation of the spatial arrangement of its 54 proteins and its three rRNA molecules. The structural organization of ribosomal components has been investigated by a number of experimental approaches. Specific antibodies directed against each of the 54 ribosomal proteins of Escherichia coli have been performed to examine antibody-subunit complexes by electron microscopy. The position of the bound antibody, specific for a particular protein, can be determined; it indicates the location of the corresponding protein on the ribosomal surface.The three-dimensional distribution of each of the 21 small subunit proteins on the ribosomal surface has been determined by immuno electron microscopy: the 21 proteins have been found exposed with altogether 43 antibody binding sites. Each one of 12 proteins showed antibody binding at remote positions on the subunit surface, indicating highly extended conformations of the proteins concerned within the 30S ribosomal subunit; the remaining proteins are, however, not necessarily globular in shape (Fig. 1).


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