H S Barra
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Explore the profile of H S Barra including associated specialties, affiliations and a list of published articles.
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58
Citations
903
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Recent Articles
1.
Alonso A, Zaidi T, Novak M, Barra H, Grundke-Iqbal I, Iqbal K
J Biol Chem
. 2001 Aug;
276(41):37967-73.
PMID: 11495914
The microtubule-associated protein tau is a family of six isoforms that becomes abnormally hyperphosphorylated and accumulates in neurons undergoing neurodegeneration in the brains of patients with Alzheimer disease (AD). We...
2.
Casale C, Alonso A, Barra H
Mol Cell Biochem
. 2001 Feb;
216(1-2):85-92.
PMID: 11216868
Membranes from brain tissue contain tubulin that can be isolated as a hydrophobic compound by partitioning into Triton X-114. The hydrophobic behavior of this tubulin is due to the formation...
3.
Sironi J, Barra H, Arce C
Anal Biochem
. 2000 Feb;
279(1):9-17.
PMID: 10683225
We have developed a method for the determination of tubulin carboxypeptidase activity which is based on the action of the enzyme on the substrate, [14C]tyrosinated tubulin, previously adsorbed on nitrocellulose...
4.
Bongiovanni G, Fissolo S, Barra H, Hallak M
J Neurosci Res
. 1999 Apr;
56(1):85-92.
PMID: 10213479
We have previously reported the posttranslational addition of [14C]-arginine in the N-terminus of several soluble rat brain proteins. One of these proteins was identified as the microtubule-associated protein, the stable...
5.
Contin M, Sironi J, Barra H, Arce C
Biochem J
. 1999 Apr;
339 ( Pt 2):463-71.
PMID: 10191280
Tubulin carboxypeptidase is the enzyme that releases the C-terminal tyrosine from alpha-tubulin, converting tyrosine-terminated (Tyr) to detyrosinated (Glu) tubulin. The present study demonstrates that this enzyme is associated with microtubules...
6.
Alonso A, Beltramo D, Casale C, Barra H
Biochem Biophys Res Commun
. 1999 Jan;
253(3):824-7.
PMID: 9918812
We have previously described that the tubulin isolated from brain membranes as a hydrophobic compound by partitioning into Triton X-114 is a peripheral membrane protein [corrected]. The hydrophobic behavior of...
7.
Weizetfel J, Smania A, Barra H, Argarana C
Mol Cell Biochem
. 1997 May;
170(1-2):139-46.
PMID: 9144328
A preparation of tubulin carboxypeptidase partially purified from bovine brain was found to contain a protein of molecular mass 30 kDa (P30) as determined by SDS-PAGE, that is recognized by...
8.
Fernandez M, Beltramo D, Alonso A, Barra H
Mol Cell Biochem
. 1997 May;
170(1-2):91-8.
PMID: 9144322
Brain membranes contain tubulin that can be isolated as a hydrophobic compound by partitioning into Triton X-114. We have previously postulated: (a) that this kind of tubulin is a peripheral...
9.
Sironi J, Barra H, Arce C
Mol Cell Biochem
. 1997 May;
170(1-2):9-16.
PMID: 9144313
Tubulin carboxypeptidase, the enzyme which releases the COOH terminal tyrosine from the alpha-chain of tubulin, remains associated with microtubules through several cycles of assembly/disassembly (Arce CA, Barra HS: FEBS Lett...
10.
Beltramo D, Fernandez M, Alonso A, Sironi J, Barra H
Neurochem Res
. 1997 Apr;
22(4):385-9.
PMID: 9130248
We demonstrate here that brain purified tubulin can be dissociated into alpha and beta subunits at pH > 10 and that the subunits can be separated by using the Triton...