A Primordial Power Failure: Why Acetyl Phosphate Fails as an Evolutionary Engine

The origin of life is arguably the greatest hurdle for any theory of unguided evolution. At the heart of the problem is a classic “chicken-and-egg” dilemma: the genetic code in DNA is required to build the proteins that, in turn, are required to read the code. The entire system is powered by a sophisticated, rechargeable energy currency molecule, adenosine triphosphate (ATP). In a 2018 paper titled “Acetyl Phosphate as a Primordial Energy Currency at the Origin of Life,” researchers Alexandra Whicher, Nick Lane, and their colleagues attempt to solve the energy part of this puzzle by proposing a simpler, prebiotic stand-in for ATP: acetyl phosphate (AcP). The study is presented as a plausible step toward a naturalistic origin of metabolism.

However, a critical analysis of the paper’s methods and results reveals the opposite. Far from bridging the chasm between non-life and life, the study is a masterclass in investigator interference and provides stark experimental confirmation of the very chemical barriers that make an unguided origin of life impossible. The research doesn’t show how life could have started; it shows why it couldn’t have.

A Fair Summary of the Research

The authors’ stated goal was to test whether acetyl phosphate (AcP), a simple two-carbon molecule, could have acted as a primitive energy currency under plausible prebiotic conditions. Their direct, experimental findings can be summarized as follows:

• Synthesis of AcP: They successfully synthesized AcP by mixing its precursors, thioacetate and inorganic phosphate, in water. The reaction occurred within minutes under a range of “ambient” and “mild hydrothermal” conditions (20-50 °C, pH 6-8), achieving modest yields of up to 2%.
• Phosphorylation Power: They demonstrated that this newly formed AcP could indeed act as an energy source to phosphorylate other key molecules. It successfully converted ribose into ribose-5-phosphate, adenosine into adenosine monophosphate (AMP), and, most notably, adenosine diphosphate (ADP) into the modern cellular fuel, ATP.
• A Critical Failure: Despite these limited successes in “monomer biochemistry,” the authors report a complete and total failure at the most crucial step. AcP did not promote the polymerization of either glycine (the simplest amino acid) or AMP (a nucleotide). Polymerization is the essential process of linking monomers together to form the long-chain macromolecules of life—proteins (polypeptides) and RNA.
• Destructive Side Reactions: Instead of forming peptide bonds between glycine molecules, the AcP preferentially acetylated the glycine, creating N-acetyl glycine. This side-reaction, which the authors note “hinder[ed] the formation of polypeptides,” effectively terminated any possibility of forming a protein.

The authors conclude that while AcP might be a “plausible and biologically meaningful link between prebiotic chemistry and monomer biochemistry,” it is “unlikely to have driven polymerization of macromolecules such as polypeptides or RNA in free solution.”

The Core Analysis: An Experiment in Intelligent Design

The paper’s conclusions, while honestly reported, are framed within a narrative of evolutionary progress. But the experimental details themselves tell a story of failure, demonstrating precisely why unguided chemistry is not a causally adequate explanation for the origin of life’s systems.

Investigator Interference is the True “Energy Currency”

The most glaring flaw is the profound level of illegitimate investigator interference. The experiment succeeds only because the researchers’ intelligence supplies the critical design and control that is absent in nature.

• Purified, Concentrated Reagents: The experiments began with purified, commercially-sourced, and highly concentrated starting materials (e.g., 0.3 M ribose, 0.5 M ADP). In any plausible prebiotic scenario, these molecules would not exist. The “primordial soup” is a geochemical fantasy. Even if trace amounts of these molecules formed, they would be massively diluted and contaminated by a vast excess of non-biological tars and other interfering chemicals. The researchers did not replicate a primordial pond; they replicated a well-stocked, well-organized chemistry lab.
• Choreographed Conditions: The reactions were performed under meticulously controlled pH, temperature, and ionic conditions. The researchers then stopped the reactions at specific time points by freezing the samples at -80°C. This is a classic “chemist’s trap,” isolating a desired product before the very same conditions that created it can inevitably destroy it. An unguided world has no chemist to intervene with foresight and a freezer.

The “Ideal Poise” is a Fatal Flaw

The authors celebrate AcP’s “ideal poise between stability and reactivity,” noting it hydrolyzes completely in a few hours at 50°C. In an unguided world, this is not a benefit; it is a fatal flaw. Without pre-existing, integrated machinery to immediately harness its energy for a specific purpose (like building RNA), the AcP molecule would simply and rapidly break down, its energy dissipating uselessly as heat. Its fleeting existence makes it a dead-end, not an engine.

Experimental Proof of the Polymerization Problem

The paper’s most significant result is its primary failure. The inability of AcP to polymerize either amino acids or nucleotides is not a minor setback; it is a catastrophic roadblock. The entire purpose of a cellular energy currency is to drive the construction of functional macromolecules. This “primordial energy currency” failed at its only meaningful job.

Worse, it demonstrates a core principle long articulated by abiogenesis critics: unguided energy in a chemical mixture leads to destructive side-reactions. The fact that AcP preferentially acetylated glycine, actively hindering the formation of a protein chain, is a powerful experimental confirmation that unguided chemistry works against the formation of life. The researchers have not discovered a pathway to life; they have experimentally validated a pathway to a chemical dead-end.

The Alternative Explanation: The Signature of Foresight

This study provides a perfect opportunity to apply the historical scientific method of “inference to the best explanation” and the vera causa (true cause) principle, which states that we should seek causes known to have the power to produce the effect in question.

What is the true cause of the limited, temporary chemical order produced in this experiment? It is undeniably the intelligence of the researchers. They used foresight to select purified reagents, planning to mix them in a specific order and under specific conditions to achieve a desired goal. Our uniform and repeated experience confirms that intelligence is the only known cause capable of generating such functionally integrated chemical systems.

The experiment unwittingly highlights the irreducible complexity of cellular metabolism. For life to exist, you need, all at once:

1. A stable, rechargeable energy currency (like ATP).
2. The specific molecular machinery to create that currency.
3. The specific molecular machinery (e.g., polymerases) to harness that currency’s energy.
4. A source of genetic information (like DNA) to direct the construction of the machinery.
5. The building blocks (amino acids, nucleotides) from which to build the machinery.

These components form an integrated, all-or-nothing system. The idea that they could assemble piece by piece through an unguided process like that modeled in this paper defies both logic and the paper’s own experimental results.

The biblical framework of creation provides a far more causally adequate explanation. An intelligent Creator engineered life as a fully integrated system from the beginning, complete with its ATP energy cycle, DNA information library, and protein-based machinery. The chemical tendencies observed in this paper—the rapid degradation of useful molecules and the dominance of destructive side-reactions—are not snapshots of a creative process. Rather, they are exactly what we would expect in a fallen world governed by the Second Law of Thermodynamics, where all complex, specified systems inevitably decay over time unless upheld by an intelligent program.

Conclusion

While presented as a step toward a naturalistic origin of life, the research by Whicher et al. serves as a powerful refutation of the concept. By demonstrating the necessity of purified reagents, the fatal instability of the proposed energy molecule, and, most importantly, the dominance of destructive side-reactions that prevent the formation of life’s essential polymers, the paper experimentally confirms the futility of abiogenesis.

The study fails to explain the origin of a single nucleotide of specified biological information or the assembly of a single functional protein. It shows that simply adding energy to a chemical soup does not create life; it creates sludge and chemical dead-ends. The only “primordial currency” at work here was the intelligence of the researchers themselves, reinforcing the conclusion that specified complexity and functional integration are, and have always been, products of a mind.