Recent findings in protein evolution and peptide prebiotic plausibility have been setting the stage for reconsidering the role of peptides in the early stages of life’s origin.
proteins
![Coupled bilayer nanopore concept for physical guiding, tracking and sizing of single molecules a, Fabrication schematic including EBL, etching, 2D materials transfer and AC-STEM sculpting. SiN nanopores constitute a GURU platform. Pore thicknesses are tSiN and t2D, diameters are dSiN and d2D and the total thickness is tGURU. Device configurations are denoted as [N, M] for N SiN pores and M 2D pores. σSiN and σ2D denote surface charge densities of SiN and 2D pores, respectively. The interlayer separation, L, can be experimentally controlled by the duration of RIE. -- Nature](https://i0.wp.com/astrobiology.com/wp-content/uploads/2024/09/Tricorder-Tech-Novel-Coupled-Nanopore.png?resize=1200%2C719&ssl=1)
Posted inBiochemistry & Organic Chemistry, Biophysics, Biosignatures & Paleobiology, Exploration Gear & Tech, Genomics, Proteomics, Bioinformatics, Microbiology & Virology, Nanotechnology & SynBio, Press Release, Tricorders & Sensors
Tricorder Tech: Novel Coupled Nanopore Platform Offers Greater Precision For Detecting Molecules
Editor’s note: As we begin to expand our search for life to other worlds we are going to need to be economical interms of the equipment we send and how […]
Posted inBiochemistry & Organic Chemistry, Biophysics, Biosignatures & Paleobiology, Extremeophiles and Extreme Environments, Status Report, Tardigrades
Structural Adaptability and Surface Activity of Peptides Derived from Tardigrade Proteins
Tardigrades are unique micro-organisms with a high tolerance to desiccation. The protection of their cells against desiccation involves tardigrade-specific proteins, which include the so-called cytoplasmic abundant heat soluble (CAHS) proteins.
Posted inBiochemistry & Organic Chemistry, Biophysics, Biosignatures & Paleobiology, Genomics, Proteomics, Bioinformatics, Origin & Evolution of Life, Status Report
Origins Of life: The Protein Folding Problem All Over Again?
How did specific useful protein sequences arise from simpler molecules at the origin of life? This seemingly needle-in-a-haystack problem has remarkably close resemblance to the old Protein Folding Problem, for […]
Posted inAstrochemistry, Astrogeology, Atmospheres, Climate, Weather, Biochemistry & Organic Chemistry, Biogeochemical Cycles & Geobiology, Biophysics, Biosignatures & Paleobiology, Origin & Evolution of Life, Status Report, Water/Hycean Worlds & Oceanography
Understanding the Role of Layered Minerals in the Emergence and Preservation of Proto-Proteins and Detection of Traces of Early Life
The origin of life remains one of the most profound mysteries in science. Over millennia, theories have evolved, yet the question persists: How did life emerge from inanimate matter?
Posted inAI - Data - Apps - Cybernetics, Astrochemistry, Biochemistry & Organic Chemistry, Biophysics, Biosignatures & Paleobiology, Commercial & Private Sector, Genomics, Proteomics, Bioinformatics, Nanotechnology & SynBio, Press Release
AlphaFold 3 Predicts The Structure And Interactions Of All Of Life’s Molecules
Inside every plant, animal and human cell are billions of molecular machines. They’re made up of proteins, DNA and other molecules, but no single piece works on its own. Only […]
Posted inBiochemistry & Organic Chemistry, Biogeochemical Cycles & Geobiology, Biophysics, Biosignatures & Paleobiology, Origin & Evolution of Life, Press Release
Drawing A Line Back To The Origin Of Life On Earth
Scientists in Cambridge University suggest molecules, vital to the development of life, could have formed from a process known as graphitisation. Once verified in the laboratory, it could allow us […]
Posted inBiochemistry & Organic Chemistry, Biophysics, Biosignatures & Paleobiology, Genomics, Proteomics, Bioinformatics, Origin & Evolution of Life, Press Release
Heat Flows Are The Secret To Order In Prebiotic Molecular Kitchen
Life is complicated. What is true for our everyday existence also holds for the many complex processes that take place inside cells. Proteins constantly have to be synthesized, cell walls […]
Posted inAstrochemistry, Astrogeology, Biochemistry & Organic Chemistry, Biophysics, Biosignatures & Paleobiology, Origin & Evolution of Life, Panspermia, Press Release
Do We Have Cosmic Dust To Thank For Life On Earth?
Before life existed on Earth, there had to be chemistry to form organic molecules from the chemical elements nitrogen, sulphur, carbon and phosphorus.
![The proto-ribosome: (a) The symmetrical region within the 23S rRNA of E. coli ribosome (PDB code 2AW4). The A- and P-subregions, in blue and green, respectively, throughout. Helices H68-H71 were removed to reveal the PTC area. (b) 2D scheme of the symmetrical region (on colored background), drawn in a manner exhibiting the twofold symmetry, with the central loop of domain V (C-loop) at its center. The sequence assigned to the remnant of the DPR (boundary marked) is composed of two L-shaped molecules, the A- and P-DPR monomers. Nucleotides conserved by more than 97% in each of the three life domains, as detected in the CRW site [77], are presented by capital letters and the remaining nucleotides by circles. (c) Overlap of the DPR fold as found in the high-resolution structures of archaea (PDB code 1VQ6), bacteria (PDB code 2WDL), and eukarya (PDB code 3U5D) ribosomes, portraying its extreme tertiary conservation in the three life domains. The pocket is projected approximately along the symmetry axis, with the reactants (PDB code 2WDL) positioned at the bottom of the cavity. (d) Overlap of the A- and P-DPR monomers from E. coli (PDB code 2AW4), obtained by rotating one monomer by 179.6° around the symmetry axis. The projection direction is perpendicular to the one shown in (c). tRNA molecule (PDB code 4TRA, in gray) is overlaid with its anticodon arm overlapping H89 and H93 helices from the P- and A-monomers, respectively. Magnified nucleotides from the superimposed stems of H89 and its symmetry-related H93 depict the conformational match. Nucleotide A2602, which is functionally active, bulges into the PTC and breaks the overall symmetry. (e) Model of a minimal coded proto-ribosome assembled from four L-shaped entities of about 60–70 nucleotides each (derived from PDB code 1VY4), i.e., the A-, P-DPR monomers, the proto-SSU (purple), and the bridging element (dark red), complexed with mRNA (orange) and tRNA (cyan). -- LIFE](https://i0.wp.com/astrobiology.com/wp-content/uploads/2024/02/Three-Biopolymers.png?resize=1200%2C716&ssl=1)
Posted inBiochemistry & Organic Chemistry, Biophysics, Biosignatures & Paleobiology, Genomics, Proteomics, Bioinformatics, Origin & Evolution of Life, Status Report
Three Biopolymers And Origin Of Life Scenarios
To track down the possible roots of life, various models for the initial living system composed of different combinations of the three extant biopolymers, RNA, DNA, and proteins, are presented.