Xanthurenic Acid Is the Main Pigment of Trichonephila clavata Gold Dragline Silk
نویسندگان
چکیده
منابع مشابه
Analysis of repetitive amino acid motifs reveals the essential features of spider dragline silk proteins
The extraordinary mechanical properties of spider dragline silk are dependent on the highly repetitive sequences of the component proteins, major ampullate spidroin 1 and 2 (MaSp2 and MaSp2). MaSp sequences are dominated by repetitive modules composed of short amino acid motifs; however, the patterns of motif conservation through evolution and their relevance to silk characteristics are not wel...
متن کاملNovel Assembly Properties of Recombinant Spider Dragline Silk Proteins
Spider dragline silk, which exhibits extraordinary strength and toughness, is primarily composed of two related proteins that largely consist of repetitive sequences. In most spiders, the repetitive region of one of these proteins is rich in prolines, which are not present in the repetitive region of the other. The absence of prolines in one component was previously speculated to be essential f...
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An altered or increased excretion of xanthurenic acid (XA) in urine for 24h after intake of 5 grams L-tryptophan (Trp) at 10:00 p.m. is considered a measure of strain in the organism. XA was studied in 104 hospitalized depressive patients (DSM-HI : 296.23; 296.33) and 15 controls. Zung anxiety and depression scales were rated. The XA-excretion after Trp load has a wider range than the blank XA-...
متن کاملNanostructure and molecular mechanics of spider dragline silk protein assemblies.
Spider silk is a self-assembling biopolymer that outperforms most known materials in terms of its mechanical performance, despite its underlying weak chemical bonding based on H-bonds. While experimental studies have shown that the molecular structure of silk proteins has a direct influence on the stiffness, toughness and failure strength of silk, no molecular-level analysis of the nanostructur...
متن کاملViscous Friction between Crystalline and Amorphous Phase of Dragline Silk
The hierarchical structure of spider dragline silk is composed of two major constituents, the amorphous phase and crystalline units, and its mechanical response has been attributed to these prime constituents. Silk mechanics, however, might also be influenced by the resistance against sliding of these two phases relative to each other under load. We here used atomistic molecular dynamics (MD) s...
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ژورنال
عنوان ژورنال: Biomolecules
سال: 2021
ISSN: 2218-273X
DOI: 10.3390/biom11040563