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J Biol Chem, Vol. 274, Issue 51, 36043-36051, December 17, 1999
From the Four different classes of mammalian mitochondrial
ribosomal proteins were identified and characterized. Mature proteins
were purified from bovine liver and subjected to N-terminal or
matrix-assisted laser-desorption mass spectroscopic amino acid
sequencing after tryptic in-gel digestion and high pressure liquid
chromatography separation of the resulting peptides. Peptide sequences
obtained were used to virtually screen expressed sequence tag data
bases from human, mouse, and rat. Consensus cDNAs were assembled
in silico from various expressed sequence tag sequences
identified. Deduced mammalian protein sequences were characterized and
compared with ribosomal protein sequences of Escherichia
coli and yeast mitochondria. Significant sequence similarities to
ribosomal proteins of other sources were detected for three out of four
different mammalian protein classes determined. However, the sequence
conservation between mitochondrial ribosomal proteins of mammalian and
yeast origin is much less than the sequence conservation between
cytoplasmic ribosomal proteins of the same species. In particular, this
is shown for the mammalian counterparts of the E. coli
EcoL2 ribosomal protein (MRP-L14), that do not conserve the specific
and functional highly important His229 residue of E. coli and the corresponding yeast mitochondrial Rml2p.
The nucleotide sequence(s) reported in this paper has been submitted to the GenBankTM/EMBL Data Bank with accession number(s) S78756 (MRP-L5bov), S78757
(MRP-L7bov), S78758 (MRP-L14bov), and S78759
(MRP-L26bov), respectively.
Mammalian Mitochondrial Ribosomal Proteins (2)
AMINO ACID SEQUENCING, CHARACTERIZATION, AND IDENTIFICATION OF
CORRESPONDING GENE SEQUENCES*
,
,
,
**
Department of Biochemistry and Molecular
Biology, College of Medicine, University of Florida, Gainesville,
Florida 32610-0245, § Max-Delbrück-Center for
Molecular Medicine, Robert-Rössle-Str. 10, D-13125 Berlin,
Germany, ¶ Nemours Children's Clinic, Research, Jacksonville,
Florida 32207, and the
Institute for Biology-Genetics, AG
Kress, Free University of Berlin, Arnimallee 7, D-14195 Berlin, Germany
*
This work was supported by United States Public Health
Service Grant GM15438 (to T. W. O.).The costs of publication of this article were defrayed in part by the
payment of page charges. The article
must therefore be hereby marked
"advertisement" in accordance with 18 U.S.C. Section
1734 solely to indicate this fact.
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