Origin of Life

Abstract

Primitive life – defined as a chemical system capable of transfering its molecular information via self‐replication and also capable of evolving – probably originated about 4 billion years ago from the processing of organic molecules by liquid water. Organic matter might have been formed in the primitive atmosphere from methane or carbon dioxide but also in submarine hydrothermal vents. A large fraction of prebiotic organic material might have been brought by meteoritic and cometary dust grains decelerated by the atmosphere. Strategies to understand the origin of life include the reconstitution in the laboratory of an artificial life capable of self‐reproduction and evolution, the search for fossil traces of life in Archeaen sediments and the search for another example of natural life beyond the Earth, on Mars, Europa, Titan, Enceladus and exoplanets.

Key Concepts:

  • Life emerged about 4 billion years ago with organic molecules capable of self‐reproduction and of evolving in liquid water.

  • A large fraction of the prebiotic organic material came from space.

  • The reconstruction of life in a test tube lacks a simple synthesis of RNA.

  • The very early fossil traces of life have been erased.

  • The oldest accepted fossil traces of life are 3.45 billion years old.

  • Mars harboured large oceans in the past and was therefore hospitable to life.

  • Life may be present within the Europa's ocean.

  • Organic chemistry is universal. Life may therefore arise on appropriate extrasolar planets.

Keywords: prebiotic chemistry; chemical evolution; geological records; microfossils; mars; europa; titan; exoplanets

Figure 1.

Micrometeorites (50–100 μm) collected in Antarctica ice. Courtesy of M Maurette.

Figure 2.

Fossilised coccoidal cells in a ∼3.5‐Ga‐old volcanic sediment from the Pilbara, Australia. Two sizes of cells are present: a small dividing pair at the bottom of the image, 0.4 μm in diameter, and larger cells, 0.8 μm in diameter, also exhibiting cell division. Courtesy of F Westall.

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References

Bada JL, Fegley Jr, B, Miller SL et al. (2007) Debating evidence for the origin of life on Earth. Science 315: 937–938.

Bailey J (2001) Astronomical sources of circularly polarized light and the origin of homochirality, Origins Life Evol. Biosphere 31: 167–183.

Bibring JP, Langevin Y, Mustard JF et al. (2006) Global mineralogical and aqueous Mars history derived from OMEGA/Mars Express data revealed by the infrared spectrometer OMEGA onboard the European orbiter Mars Express. Science 312: 400–404.

Brack A (2007) From interstellar amino acids to prebiotic catalytic peptides. Chemistry & Biodiversity 4: 665–679.

Catling D and Kasting JF (2007) Planetary atmospheres and life. In: Sullivan III WT and Baross JA (eds) Planets and Life pp. 91–116. Cambridge: Cambridge University Press.

Chyba CF and Phillips CB (2007) Europa. In: Sullivan III WT and Baross JA (eds) Planets and Life pp. 388–423. Cambridge: Cambridge University Press.

Cleaves HJ, Chalmers JH, Lazcano A, Miller SL and Bada JL (2008) A reassessment of prebiotic organic synthesis in neutral planetary atmospheres. Origins of Life and Evolution of the Biosphere 38: 105–115.

Cronin JR and Pizzarello S (1997) Enantiomeric excesses in meteoritic amino acids. Science 275: 951–955.

Deamer DW (1998) Membrane compartments in prebiotic evolution. In: Brack A (ed.) The molecular origins of life: assembling pieces of the puzzle pp. 189–205. Cambridge: Cambridge University Press.

Despois D and Cottin H (2005) Comets: potential sources of prebiotic molecules. In: Gargaud M, Barbier B, Martin H and Reisse J (eds) Lectures in Astrobiology pp. 289–352. Berlin Heidelberg: Springer.

Fukue T, Tamura M, Kandori R et al. (2010) Extended high circular polarization in the Orion massive star forming region: implications for the origin of homochirality in the Solar System. Origins of Life and Evolution of the Biosphere 40: 335–346.

Holm NG and Andersson EM (2005) Hydrothermal simulation experiments as a tool for studies of the origin of life on Earth and other terrestrial planets: a Review. Astrobiology 5: 444–460.

Holm NG and Charlou J‐L (2001) Initial indications of abiotic formation of hydrocarbons in the Rainbow ultramafic hydrothermal system, mid‐Atlantic ridge. Earth and Planetary Science Letters 191: 1–8.

Huber C and Wächtershäuser G (1998) Peptides by activation of amino acids with CO on (Ni, Fe) surfaces: implications for the origin of life. Science 281: 670–672.

Huber C and Wächtershäuser G (2006) α‐Hydroxy and α‐amino acids under possible Hadean, volcanic origin‐of‐life conditions. Science 314: 630–632.

Johnson AP, Cleaves HJ, Dworkin JP et al. (2008) The Miller volcanic spark discharge experiment. Science 322: 404.

Lunine JI and Rizk B (2007) Titan. In: Sullivan III WT and Baross JA (eds) Planets and Life pp. 424–443. Cambridge: Cambridge University Press.

Matrajt G, Pizzarello S, Taylor S and Brownlee D (2004) Concentration and variability of the AIB amino acid in polar micrometeorites: implications for the exogenous delivery of amino acids to the primitive Earth. Meteoritics & Planetary Science 39: 1849–1858.

Maurette M (2006) Micrometeorites and the Mysteries of Our Origins. Berlin Heidelberg: Springer.

Maurette M and Brack A (2006) Cometary petroleum in Hadean time? Meteoritics Planet. Science 41: 5247.

McKay DS, Gibson EK, Thomas‐Keprta KL et al. (1996) Search for past life on Mars: possible relic biogenic activity in Martian meteorite ALH 84001. Science 273: 924–930.

Miller SL (1953) The production of amino acids under possible primitive Earth conditions. Science 117: 528–529.

Miller SL (1998) The endogenous synthesis of organic compounds. In: Brack A (ed.) The Molecular Origins of Life: Assembling Pieces of the Puzzle pp. 59–85. Cambridge: Cambridge University Press.

Mojzsis SJ, Arrhenius G, McKeegan KD et al. (1996) Evidence for life on Earth before 3,800 million years ago. Nature 384: 55–59.

Pizzarello S (2007) The chemistry that preceded life's origin: a study guide from meteorites. Chemistry & Biodiversity 4: 680–693.

Pizzarello S and Shock E (2010) The organic composition of carbonaceous meteorites: the evolutionary story ahead of biochemistry. Cold Spring Harbor Perspectives in Biology 2 a002105.

Powner M W, Gerland B and Sutherland J D (2009) Synthesis of activated pyrimidine ribonucleotides in prebiotically plausible conditions. Nature 459: 239–242.

Prieur B (2001) Etude de l'activité prébiotique potentielle de l'acide borique. C. R. Acad. Sci., Chemistry 4: 667–670.

Raulin F (2005) Astrobiology of Saturn's moon Titan. In: Horneck G and Rettberg P (eds) Complete Course in Astrobiology pp. 223–252. Weinheim: Wiley‐VCH.

Ricardo A, Carrigan MA, Olcott AN and Benner SA (2004) Borate minerals stabilize ribose. Science 303: 196.

Rosing MT (1999) 13C depleted carbon microparticles in >3700 Ma seafloor sedimentary rocks from West Greenland. Science 283: 674–676.

Schidlowski M (1988) A 3,800‐million‐year isotopic record of life from carbon in sedimentary rocks. Nature 333: 313–318.

Schmitt‐Kopplin P, Gabelica Z, Gougeon RD et al. (2010) High molecular diversity of extraterrestrial organic matter in Murchison meteorite revealed 40 years after its fall. Proceedings of the National Academy of Sciences of the USA 107: 2763–2768.

Schopf JW (1993) Microfossils of the early Archean Apex Chert: new evidence of the antiquity of life. Science 260: 640–646.

Schopf JW (1998) Tracing the roots of the universal tree of life. In: Brack A (ed.) The Molecular Origins of Life: Assembling Pieces of the Puzzle pp. 336–362. Cambridge: Cambridge University Press.

Selsis F, Léger A and Ollivier M (2005) Spectroscopic signatures of life on exoplanets – the Darwin and TPF missions. In: Gargaud M, Barbier B, Martin H and Reisse J (eds) Lectures in Astrobiology pp. 385–423. Berlin: Springer.

Sotin C and Prieur D (2007) Jupiter's moon Europa: geology and habitability. In: Horneck G and Rettberg P (eds) Complete Course in Astrobiology pp. 253–271. Weinheim: Wiley‐VCH.

Stoks PG and Schwartz AW (1982) Basic nitrogen‐heterocyclic compounds in the Murchison meteorite. Geochimica et Cosmochimica Acta 46: 309–315.

Tarter JC (2007) Searching for extraterrestrial intelligence. In: Sullivan III WT and Baross JA (eds) Planets and Life pp. 513–536. Cambridge: Cambridge University Press.

Wächtershäuser G (2007) On the chemistry and evolution of the pioneer organism. Chemistry & Biodiversity 4: 584–602.

Westall F (2009) Life on an anaerobic planet. Science 323: 471–472.

Westall F, de Ronde CEJ, Southam G et al. (2006) Implications of a 3.472‐3.333 Ga‐old subaerial microbial mat from the Barberton greenstone belt, South Africa for the UV environmental conditions on the early Earth. Philosophical Transactions of the Royal Society of London. Series B 361: 1857–1875.

van Zuilen MA, Lepland A, Teranes JL et al. (2003) Graphite and carbonates in the 3.8 Ga old Isua Supracrustal Belt, southern West Greenland. Precambrian Research 126: 331–348.

Further Reading

Basiuk VA (2010) Astrobiology: Emergence, Search and Detection of Life. Los Angeles: American Scientific Publishers.

Brack A (ed.) (1998) The Molecular Origins of Life: Assembling Pieces of the Puzzle. Cambridge: Cambridge University Press.

Gilmour I and Sephton M (2004) An Introduction to Astrobiology. Cambridge: The Open University/Cambridge University Press.

Gargaud M, Barbier B, Martin H and Reisse J (2006) Lectures in Astrobiology, Vol 1‐ part 1 & 2. Berlin: Springer.

Gargaud M, Claeys Ph, Lopez‐Garcia P et al. (2006) From Suns to Life: A Chronological Approach to the History of Life on Earth. Berlin: Springer.

Gargaud M, Claeys Ph and Martin H (2006) Lectures in Astrobiology, Vol 2. Berlin: Springer.

Horneck G and Rettberg P (2007) Complete Course in Astrobiology. Weinheim: Wiley.

Rauchfuss H (2008) Chemical Evolution and the Origin of Life. Berlin: Springer.

Sullivan III WT and Baross JA (2007) Planets and Life. Cambridge: Cambridge University Press.

Wong T‐F and Lazcano A (2009) Prebiotic Evolution and Astrobiology. Austin: Landes Bioscience.

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Brack, André(Nov 2010) Origin of Life. In: eLS. John Wiley & Sons Ltd, Chichester. http://www.els.net [doi: 10.1002/9780470015902.a0001639.pub2]