76
|
Kikuchi Y, Segawa H, Tokumoto M, Tsubokawa T, Hotta Y, Uyemura K, Okamoto H. Ocular and cerebellar defects in zebrafish induced by overexpression of the LIM domains of the islet-3 LIM/homeodomain protein. Neuron 1997; 18:369-82. [PMID: 9115732 DOI: 10.1016/s0896-6273(00)81239-8] [Citation(s) in RCA: 50] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/04/2023]
Abstract
Islet-3 is an LIM/homeodomain protein that is expressed specifically in the eyes and the presumptive tectum in the central nervous system of zebrafish (Danio rerio) embryos. Overexpression of the protein (LIM(Isl-3)) consisting only of the Islet-3 LIM domains in embryos specifically prevented formation of the optic vesicles; caused abnormal termination of the expression of wnt1, engrailed2, and pax2 in the mesencephalic and metencephalic region between 14 hr and 20 hr postfertilization; and severely impaired morphogenetic movement in this region between 20 hr and 26 hr, which should normally lead to formation of the cerebellar primordium. Such defects were all rescued by simultaneous overexpression of Islet-3, suggesting that LIM(Isl-3) acted as a specific dominant-negative variant of Islet-3. These data, combined with the results of mosaic analyses, suggest that Islet-3 is activated by putative LIM-binding cofactors and functions to promote evagination of the optic vesicles and to maintain reciprocal interaction between the mesencephalon and the mesencephalic-metencephalic boundary essential for normal development of this region.
Collapse
|
77
|
Kikuchi Y, Segawa H, Tokumoto M, Hotta Y, Uyemura K, Okamoto H. 1005 Functional analysis of zebrafish Islet-3. Neurosci Res 1997. [DOI: 10.1016/s0168-0102(97)90310-2] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/26/2022]
|
78
|
Valfells S, Brooks JS, Wang Z, Takasaki S, Yamada J, Anzai H, Tokumoto M. Quantum Hall transitions in (TMTSF)2PF6. PHYSICAL REVIEW. B, CONDENSED MATTER 1996; 54:16413-16416. [PMID: 9985757 DOI: 10.1103/physrevb.54.16413] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/07/2022]
|
79
|
Uji S, Terashima T, Aoki H, Brooks JS, Tokumoto M, Kinoshita N, Kinoshita T, Tanaka Y, Anzai H. Fermi-surface studies in the two-dimensional organic conductors (BEDT-TTF)2MHg(SCN)4 (M=Tl,K,Rb,NH4). PHYSICAL REVIEW. B, CONDENSED MATTER 1996; 54:9332-9340. [PMID: 9984669 DOI: 10.1103/physrevb.54.9332] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 04/12/2023]
|
80
|
McKenzie RH, Athas GJ, Brooks JS, Clark RG, Dzurak AS, Newbury R, Starrett RP, Skougarevsky A, Tokumoto M, Kinoshita N, Kinoshita T, Tanaka Y. Magnetoresistance and magnetic breakdown in the quasi-two-dimensional conductors (BEDT-TTF)2MHg(SCN)4. PHYSICAL REVIEW. B, CONDENSED MATTER 1996; 54:R8289-R8292. [PMID: 9984577 DOI: 10.1103/physrevb.54.r8289] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 04/12/2023]
|
81
|
Uji S, Terashima T, Aoki H, Brooks JS, Tokumoto M, Takasaki S, Yamada J, Anzai H. Rapid oscillations in the organic conductor (TMTSF)2ClO4. PHYSICAL REVIEW. B, CONDENSED MATTER 1996; 53:14399-14405. [PMID: 9983237 DOI: 10.1103/physrevb.53.14399] [Citation(s) in RCA: 19] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 04/12/2023]
|
82
|
Brooks JS, Clark RG, McKenzie RH, Newbury R, Starrett RP, Skougarevsky AV, Tokumoto M, Takasaki S, Yamada J, Anzai H, Uji S. Magneto-oscillations in the high-magnetic-field state of (TMTSF)2ClO4. PHYSICAL REVIEW. B, CONDENSED MATTER 1996; 53:14406-14410. [PMID: 9983238 DOI: 10.1103/physrevb.53.14406] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 04/12/2023]
|
83
|
Asai Y, Tokumoto M, Tanaka K, Sato T, Yamabe T. Magnetic interactions in TDAE-C60. PHYSICAL REVIEW. B, CONDENSED MATTER 1996; 53:4176-4179. [PMID: 9983977 DOI: 10.1103/physrevb.53.4176] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 04/12/2023]
|
84
|
Grigoryan LS, Tokumoto M. Evolution of Superconducting and Normal-State Properties in C60“Polymer” Doped with K. ACTA ACUST UNITED AC 1996. [DOI: 10.1080/10641229608001541] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/23/2022]
|
85
|
Brooks JS, Chen X, Klepper SJ, Valfells S, Athas GJ, Tanaka Y, Kinoshita T, Kinoshita N, Tokumoto M, Anzai H, Agosta CC. Pressure effects on the electronic structure and low-temperature states in the alpha -(BEDT-TTF)2MHg(SCN)4 organic-conductor family (M=K, Rb, Tl, NH4). PHYSICAL REVIEW. B, CONDENSED MATTER 1995; 52:14457-14478. [PMID: 9980777 DOI: 10.1103/physrevb.52.14457] [Citation(s) in RCA: 31] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 04/12/2023]
|
86
|
Tokumoto M, Gong Z, Tsubokawa T, Hew CL, Uyemura K, Hotta Y, Okamoto H. Molecular heterogeneity among primary motoneurons and within myotomes revealed by the differential mRNA expression of novel islet-1 homologs in embryonic zebrafish. Dev Biol 1995; 171:578-89. [PMID: 7556938 DOI: 10.1006/dbio.1995.1306] [Citation(s) in RCA: 89] [Impact Index Per Article: 3.1] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/25/2023]
Abstract
Zebrafish embryos have three or four identifiable primary motoneurons per hemisegment. We previously reported that, while several ventral cells initially express the zebrafish Islet-1 (Isl-1) gene, a member of the LIM/homeobox gene family, the expression of this gene becomes restricted to a single or a pair of cells slightly anterior to each segment border by 16 hr after fertilization. Double staining by in situ hybridization and immunohistochemistry strongly suggested that these cells were mainly rostral primary motoneurons. Here, we have isolated two novel zebrafish cDNA clones for more Isl-1 family genes, termed zfIsl-2 and zfIsl-3. zfIsl-2 mRNA starts to be expressed in the ventral midsegmental cells per hemisegment around 15 hr. Double labeling experiments have shown that these midsegmental cells are the caudal primary motoneuron (CaP) and its variant equivalence pair. Our results revealed the heterogeneity in the expressed genes among primary motoneurons before the fates of the primary motoneurons are irreversibly determined, and further suggest the involvement of the Isl-1 and zfIsl-2 genes in the determination of cellular identities by primary motoneurons in embryonic zebrafish. zfIsl-3 mRNA is not expressed in motoneurons but is expressed at 17 hr, mainly in the ventral myotomes. This suggests that zfIsl-3 may be involved in the regional specification of the myotome and also in target recognition by CaP. zfIsl-2 is also expressed throughout the developing eye and tectal region of the midbrain, the target for the retinal axons. In the ventral spinal cord of the spadetail mutant embryo, which has defects in the somites, the cells expressing zfIsl-2 mRNA significantly decreased in number in contrast to the increase in cells expressing Isl-1 mRNA, suggesting the influence of the somites on the expression of both genes.
Collapse
|
87
|
Campos CE, Brooks JS, Perenboom JA, Klepper SJ, Sandhu PS, Valfells S, Tanaka Y, Kinoshita T, Kinoshita N, Tokumoto M, Anzai H. Uniaxial-stress-induced superconductivity in organic conductors. PHYSICAL REVIEW. B, CONDENSED MATTER 1995; 52:R7014-R7017. [PMID: 9979738 DOI: 10.1103/physrevb.52.r7014] [Citation(s) in RCA: 24] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 04/12/2023]
|
88
|
Tanaka Y, Tokumoto M, Sugawara Y. Isotope Effect on Intramolecular Vibration of C60. ACTA ACUST UNITED AC 1995. [DOI: 10.1080/153638x9508543779] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/22/2022]
|
89
|
Athas GJ, Brooks JS, Valfells S, Klepper SJ, Tokumoto M, Kinoshita N, Kinoshita T, Tanaka Y. Evidence for density-wave domain structure in a mixed-band low-dimensional organic conductor. PHYSICAL REVIEW. B, CONDENSED MATTER 1994; 50:17713-17716. [PMID: 9976198 DOI: 10.1103/physrevb.50.17713] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 04/12/2023]
|
90
|
Song YS, Hirabayashi M, Ihara H, Tokumoto M. Anisotropy of the irreversibility lines for c-axis-aligned HgBa2Ca2Cu3O8+ delta powders. PHYSICAL REVIEW. B, CONDENSED MATTER 1994; 50:16644-16648. [PMID: 9976053 DOI: 10.1103/physrevb.50.16644] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.0] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 04/12/2023]
|
91
|
Song YS, Hirabayashi M, Ihara H, Tokumoto M, Uwe H. Anisotropy of the magnetic properties of c-axis-aligned HgBa2Ca2Cu3O8+ delta powders. PHYSICAL REVIEW. B, CONDENSED MATTER 1994; 50:517-522. [PMID: 9974570 DOI: 10.1103/physrevb.50.517] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/07/2022]
|
92
|
Kozlov M, Tanaka Y, Tokumoto M, Tani T. Luminescence and absorption spectra of BEDT-TTF and its ion radical salt. Chem Phys Lett 1994. [DOI: 10.1016/0009-2614(94)00464-1] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
|
93
|
Uji S, Aoki H, Tokumoto M, Kinoshita T, Kinoshita N, Tanaka Y, Anzai H. Fermi-surface nesting in the organic conductor (BEDT-TTF)2TlHg(SCN)4. PHYSICAL REVIEW. B, CONDENSED MATTER 1994; 49:732-735. [PMID: 10009354 DOI: 10.1103/physrevb.49.732] [Citation(s) in RCA: 11] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 04/12/2023]
|
94
|
Kaneda T, Obata H, Tokumoto M. Aromatization of 4-oxocyclohexanecarboxylic acid to 4-hydroxybenzoic acid by two distinctive desaturases from Corynebacterium cyclohexanicum. Properties of two desaturases. EUROPEAN JOURNAL OF BIOCHEMISTRY 1993; 218:997-1003. [PMID: 8281951 DOI: 10.1111/j.1432-1033.1993.tb18458.x] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 01/29/2023]
Abstract
We have previously demonstrated that Corynebacterium cyclohexanicum degrades cyclohexanecarboxylic acid, a bacteriocide, through a pathway including the aromatization of 4-oxocyclohexanecarboxylic acid to 4-hydroxybenzoic acid [Kaneda, T. (1974) Biochem. Biophys. Res. Commun. 58, 140-144]. Aromatization has now been shown to be catalysed by two desaturase enzymes. Under the action of desaturase I, 4-oxocyclohexanecarboxylic acid is converted to (+)-4-oxocyclohex-2-enecarboxylic acid which is then aromatized by desaturase II to 4-hydroxybenzoic acid. The latter reaction is presumed to occur via the unstable intermediate, 4-oxocyclohex-2,5-dienecarboxylic acid, which is spontaneously isomerized to 4-hydroxybenzoic acid. Desaturase I has been purified in an electrophoretically homogeneous form. It is monomeric with a molecular mass of 67 kDa and contains one tryptophan, one histidine and two cysteine residues per enzyme molecule. The enzyme produces an equivalent amount of 4-oxocyclohex-2-enecarboxylic acid and hydrogen peroxide from 4-oxocyclohexanecarboxylic acid. The properties of desaturase I have been studied in detail. Desaturase II is unstable and has been partially purified. Its characterization is therefore limited. However, the molecular mass of desaturase II was estimated to be 43 kDa by gel filtration chromatography. The characterization of both desaturase enzymes is described in this paper. The possible environmental importance of microbial aromatization in the biodegradation of compounds with the cyclohexane structure is discussed.
Collapse
|
95
|
Klepper SJ, Brooks JS, Chen X, Bradaric I, Tokumoto M, Kinoshita N, Tanaka Y, Agosta CC. Pressure-induced nesting in the low-dimensional organic superconductor alpha -(BEDT-TTF)2NH4Hg(SCN)4. PHYSICAL REVIEW. B, CONDENSED MATTER 1993; 48:9913-9916. [PMID: 10007258 DOI: 10.1103/physrevb.48.9913] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 04/12/2023]
|
96
|
Campos CE, Dubois JG, Gerritsen JW, Tibbitts TT, Brooks JS, Tokumoto M, Kinoshita N, Tanaka Y. Anion or cation molecular layers: Two distinct surfaces in scanning tunneling microscopy images from the organic salt (ET)2KHg(SCN)4. PHYSICAL REVIEW LETTERS 1993; 71:1720-1723. [PMID: 10054481 DOI: 10.1103/physrevlett.71.1720] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.0] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/23/2023]
|
97
|
Yuri M, Tokumoto M, Hara N, Fujimoto Y, Kobayashi N, Morisaki M. Identification of 27-nor-3 alpha, 7 alpha, 12 alpha-trihydroxycoprostan-24-one apparently derived from 3 alpha, 7 alpha, 12 alpha-trihydroxy-24-oxocoprostanoic acid, a postulated intermediate of bile acid biosynthesis. Chem Pharm Bull (Tokyo) 1993; 41:1327-9. [PMID: 8375003 DOI: 10.1248/cpb.41.1327] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/30/2023]
Abstract
Incubation of [27-13C]-3 alpha, 7 alpha, 12 alpha-trihydroxycoprost-24-en-26-oic acid with rat liver homogenate followed by 13C-NMR analysis of the incubation product has resulted in the identification of [26-13C]-27-nor-3 alpha, 7 alpha, 12 alpha-trihydroxycoprostan-24-one, supporting the idea that the substrate has been metabolized into 3 alpha, 7 alpha, 12 alpha-trihydroxy-24-oxocoprostan-26-oic acid CoA derivative.
Collapse
|
98
|
Brooks JS, Agosta CC, Klepper SJ, Tokumoto M, Kinoshita N, Anzai H, Uji S, Aoki H, Perel AS, Athas GJ, Howe DA. Novel interplay of Fermi-surface behavior and magnetism in a low-dimensional organic conductor. PHYSICAL REVIEW LETTERS 1992; 69:156-159. [PMID: 10046213 DOI: 10.1103/physrevlett.69.156] [Citation(s) in RCA: 17] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/23/2023]
|
99
|
Ihara H, Sugise R, Hirabayashi M, Terada N, Jo M, Hayashi K, Negishi A, Tokumoto M, Kimura Y, Shimomura T. A new high-Tc TlBa2Ca3Cu4O11 superconductor with Tc >120K. Nature 1988. [DOI: 10.1038/334510a0] [Citation(s) in RCA: 181] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
|
100
|
Nishihara Y, Yamaguchi Y, Tokumoto M, Takeda K, Fukamichi K. Superconductivity and magnetism of bcc Cr-Ru alloys. PHYSICAL REVIEW. B, CONDENSED MATTER 1986; 34:3446-3449. [PMID: 9940085 DOI: 10.1103/physrevb.34.3446] [Citation(s) in RCA: 17] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 04/11/2023]
|