Navigation Links
Simpler times: Did an earlier genetic molecule predate DNA and RNA?
Date:1/9/2012

this work is that TNA can fold into complex shapes that can bind to a desired target with high affinity and specificity". This feature suggests that in the future it may be possible to evolve TNA enzymes with functions required to sustain early life forms.

Nearly every organism on earth uses DNA to encode chunks of genetic information in genes, which are then copied into RNA. With the aid of specialized enzymes known as polymerases, RNA assembles amino acids to form essential proteins. Remarkably, the basic functioning of the genetic code remains the same, whether the organism is a snail or a senator, pointing to a common ancestor in the DNA-based microbial life already flourishing some 3.5 billion years ago.

Nevertheless, such ancestors were by this time quite complex, leading some scientists to speculate about still earlier forms of self-replication. Before DNA emerged to play its dominant role as the design blueprint for life, a simpler genetic world dominated by RNA may have prevailed. The RNA world hypothesis as it's known alleges that ribonucleic acid (RNA) acted to store genetic information and catalyze chemical reactions much like a protein enzyme, in an epoch before DNA, RNA and proteins formed the integrated system prevalent today throughout the living world.

While the iconic double helix of DNA is formed from two complimentary strands of nucleotides, attached to each other by base pairing in a helical staircase, RNA is single-stranded. The two nucleic acids DNA and RNA are named for the type of sugar complex that forms each molecule's sugar-phosphate backbonea kind of molecular thread holding the nucleotide beads together.

Could a simpler, self-replicating molecule have existed as a precursor to RNA, perhaps providing genetic material for earth's earliest organisms? Chaput's experiments with the nucleic acid TNA provide an attractive case. To begin with, TNA uses tetrose sugars, named for the four-carbon ring porti
'/>"/>

Contact: Joseph Caspermeyer
Joseph.Caspermeyer@asu.edu
Arizona State University
Source:Eurekalert

Page: 1 2 3 4

Related biology news :

1. Simpler woodland strawberry genome aids research on more complex fruits
2. Simpler way of making proteins could lead to new nanomedicine agents
3. Health diagnosis made simpler
4. Compound screening for drug development made simpler
5. Just like old times: Generating RNA molecules in water
6. From heterogeneous patient measurements towards earlier diagnosis in Alzheimers disease
7. Hysterectomy increases risk for earlier menopause among younger women
8. UCLA researchers develop system that finds prostate cancer spread earlier than conventional imaging
9. When you can recite a poem but not remember who asked you to learn it a few days earlier
10. New understanding of biomarkers could lead to earlier diagnosis of fatal diseases
11. China fossil shows bird, crocodile family trees split earlier than thought
Post Your Comments:
*Name:
*Comment:
*Email:
(Date:10/19/2014)... access in India over the last 30 years ... emissions growth during that time, according to a ... Climate Change ., "Energy access is fundamental to ... life, including education, communication, and health," says IIASA ... While increased energy access is widely agreed to ...
(Date:10/18/2014)... patients referred for evaluation of suspected genetic conditions, ... 25 percent, including detection of a number of ... disease, according to a study appearing in ... coincide with the American Society of Human Genetics ... or coding regions of thousands of genes simultaneously ...
(Date:10/17/2014)... – Accurate knowledge regarding Ebola is critical and pertinent ... of hazardous global outbreak and epidemic. The Journal, ... a special issue, Ebola Virus and Public Health, to ... knowledge in this critical societal moment. , On ... Ebola for Clinicians . The primer was prepared by ...
Breaking Biology News(10 mins):Improved electricity access has little impact on climate change 2Whole-exome sequencing shows potential as diagnostic tool 2
... Director of Genomic Technologies, Dr Yijun RUAN, led a ... how genes interact/communicate and influence each other, even when ... discovery is crucial in understanding how human genes work ... and coordination takes place in human cells. The ...
... Spotted salamanders exposed to contaminated roadside ponds are ... paper in Scientific Reports. This study provides the first ... negative effects of roads apparently by evolving rapidly. ... a host of contaminants from road runoff. Chief among ...
... The first study to check the effects of eating ... small helpings of purple potatoes (Purple Majesty) a day decreases ... In a report in the ACS, Journal of Agricultural ... seemingly small, is sufficient to potentially reduce the risk of ...
Cached Biology News:Singapore scientists lead in 3D mapping of human genome to help understand human diseases 2Road runoff spurring spotted salamander evolution 2
(Date:10/22/2014)...   Synthetic Biologics, Inc. (NYSE MKT: SYN), ... infections and diseases, announced today that the U.S. Patent ... for a composition of matter patent application that covers ... SYN-004. This is Synthetic Biologics, first allowed patent application ... to the Company,s extensive C. difficile patent ...
(Date:10/22/2014)... KONG , Oct. 22, 2014  aTyr Pharma ... that rare disease expert John C. McKew , ... McKew brings more than two decades of expertise in ... Institutes of Health, Wyeth Research and Genetics Institute, Inc. ... aTyr,s efforts to expand and translate its novel Physiocrine ...
(Date:10/20/2014)... 2014 Asterias Biotherapeutics, Inc. (NYSE MKT: ... a Notice of Grant Award (NGA) with the ... 1, 2014.  The NGA provides for the immediate ... of additional grant funds pursuant to the previously ... development of Asterias, product, AST-OPC1. The grant provides ...
(Date:10/20/2014)... Oct. 20, 2014 PureTech , a ... big healthcare problems, announced today the closing of ... participation from Invesco Perpetual, a $120 Billion group ... drive PureTech,s existing pipeline forward and to advance ... the scientific creativity to really go for the ...
Breaking Biology Technology:Synthetic Biologics Announces Allowance of Key U.S. Composition of Matter Patent for C. difficile Program 2Synthetic Biologics Announces Allowance of Key U.S. Composition of Matter Patent for C. difficile Program 3Synthetic Biologics Announces Allowance of Key U.S. Composition of Matter Patent for C. difficile Program 4aTyr Pharma Appoints John C. McKew, Ph.D., as Vice President, Research 2aTyr Pharma Appoints John C. McKew, Ph.D., as Vice President, Research 3Asterias Biotherapeutics Announces Notice of Grant Award with CIRM for Phase 1/2a Clinical Trial of AST-OPC1 in Complete Cervical Spinal Cord Injury 2Asterias Biotherapeutics Announces Notice of Grant Award with CIRM for Phase 1/2a Clinical Trial of AST-OPC1 in Complete Cervical Spinal Cord Injury 3Asterias Biotherapeutics Announces Notice of Grant Award with CIRM for Phase 1/2a Clinical Trial of AST-OPC1 in Complete Cervical Spinal Cord Injury 4PureTech Announces Expansion with Oversubscribed $55M Funding Round 2PureTech Announces Expansion with Oversubscribed $55M Funding Round 3PureTech Announces Expansion with Oversubscribed $55M Funding Round 4PureTech Announces Expansion with Oversubscribed $55M Funding Round 5PureTech Announces Expansion with Oversubscribed $55M Funding Round 6
... ... technology are highlighted at leading industry events. , ... Washington, DC (PRWEB) June 11, 2010 -- Open source software will be ... DIA Annual Meeting is the premier event for professionals involved in the discovery, ...
... June 11 /PRNewswire-Asia-FirstCall/ -- China-Biotics, Inc.,(Nasdaq: CHBT ) ... products in China , today reported,its financial results for the ... , , 4Q10 Financial Highlights, ... year-over-year increase;, ...
... ... of the evolution of the influenza virus and its human host, post-graduate student Stephen Huff ... of safe, free software downloads - best of all, the service is free. , ... (PRWEB) June 5, 2010 -- We ...
Cached Biology Technology:Open Source Clinical Trials Software Featured at the 46th DIA Annual Meeting 2Open Source Clinical Trials Software Featured at the 46th DIA Annual Meeting 3China-Biotics, Inc. Reports Record Quarterly and Annual Revenue Growth for Fiscal Year 2010 2China-Biotics, Inc. Reports Record Quarterly and Annual Revenue Growth for Fiscal Year 2010 3China-Biotics, Inc. Reports Record Quarterly and Annual Revenue Growth for Fiscal Year 2010 4China-Biotics, Inc. Reports Record Quarterly and Annual Revenue Growth for Fiscal Year 2010 5China-Biotics, Inc. Reports Record Quarterly and Annual Revenue Growth for Fiscal Year 2010 6China-Biotics, Inc. Reports Record Quarterly and Annual Revenue Growth for Fiscal Year 2010 7China-Biotics, Inc. Reports Record Quarterly and Annual Revenue Growth for Fiscal Year 2010 8China-Biotics, Inc. Reports Record Quarterly and Annual Revenue Growth for Fiscal Year 2010 9China-Biotics, Inc. Reports Record Quarterly and Annual Revenue Growth for Fiscal Year 2010 10China-Biotics, Inc. Reports Record Quarterly and Annual Revenue Growth for Fiscal Year 2010 11China-Biotics, Inc. Reports Record Quarterly and Annual Revenue Growth for Fiscal Year 2010 12China-Biotics, Inc. Reports Record Quarterly and Annual Revenue Growth for Fiscal Year 2010 13China-Biotics, Inc. Reports Record Quarterly and Annual Revenue Growth for Fiscal Year 2010 14China-Biotics, Inc. Reports Record Quarterly and Annual Revenue Growth for Fiscal Year 2010 15China-Biotics, Inc. Reports Record Quarterly and Annual Revenue Growth for Fiscal Year 2010 16Computational Microbiologist Uses His Expertise with Deadly Viruses to Devise a Superior System for Delivery of Safe, Free Software Downloads 2Computational Microbiologist Uses His Expertise with Deadly Viruses to Devise a Superior System for Delivery of Safe, Free Software Downloads 3Computational Microbiologist Uses His Expertise with Deadly Viruses to Devise a Superior System for Delivery of Safe, Free Software Downloads 4
This buffer is Specifically formulated to be used with Endogen's Poly-HRP Streptavidin...
... Microarray Gene Frame® has been specifically ... frames feature the same dual strength ... Frame® range for easy removal after ... and there are three sizes available. ...
For microscopy...
... slide processing offering reproducibility, reliability and ... miniaturization, automation and massive parallel analysis ... with many applications in both industrial ... from gene expression profiling, gene regulation ...
Biology Products: