Limits...
Adsorption of nucleic Acid bases, ribose, and phosphate by some clay minerals.

Hashizume H - Life (Basel) (2015)

Bottom Line: The interactions of clay minerals with biopolymers, including RNA, have been the subject of many investigations.The behavior of RNA components at clay mineral surfaces needs to be assessed if we are to appreciate how clays might catalyze the formation of nucleosides, nucleotides and polynucleotides in the "RNA world".Here, we review the interactions of some clay minerals with RNA components.

View Article: PubMed Central - PubMed

Affiliation: National Institute for Materials Science, Tsukuba 305-0044, Japan. hashizume.hideo@nims.go.jp.

ABSTRACT
Besides having a large capacity for taking up organic molecules, clay minerals can catalyze a variety of organic reactions. Derived from rock weathering, clay minerals would have been abundant in the early Earth. As such, they might be expected to play a role in chemical evolution. The interactions of clay minerals with biopolymers, including RNA, have been the subject of many investigations. The behavior of RNA components at clay mineral surfaces needs to be assessed if we are to appreciate how clays might catalyze the formation of nucleosides, nucleotides and polynucleotides in the "RNA world". The adsorption of purines, pyrimidines and nucleosides from aqueous solution to clay minerals is affected by suspension pH. With montmorillonite, adsorption is also influenced by the nature of the exchangeable cations. Here, we review the interactions of some clay minerals with RNA components.

No MeSH data available.


The layer structure of smectite group.
© Copyright Policy
Related In: Results  -  Collection

License
getmorefigures.php?uid=PMC4390872&req=5

life-05-00637-f001: The layer structure of smectite group.

Mentions: Smectite is a group including montmorillonite, beidellite, nontronite, saponite, hectorite, sauconite, and stevensite. The general structure of smectite is shown in Figure 1. Montmorillonite, beidellite, and nontronite are called dioctahedral smectite. The octahedral site is normally occupied by trivalent cations (e.g., Al3+, Fe3+, Mn3+). Saponite, hectorite, sauconite, and stevensite are called trioctahedral smectite. The octahedral site usually has divalent cations (e.g., Mg2+, Fe2+, Mn2+, Ni2+). Si4+ and Al3+ are mainly present in the tetrahedral site. One of the typical characteristics of the smectite group is the presence of an exchangeable cation (e.g., Na+, K+, Ca2+) between layers and smectite swells by intercalating water molecules between layers. Smectite can easily disperse in water and the interlayer cations can exchange with ionic organic molecules. Montmorillonite is frequently used in studies of the origin of life. The planar surface usually has a negative charge. The edge surface of montmorillonite has an isoelectric point (pH approximately 7). At pH < 7, the edge surface shows a positive charge and at pH > 7, it has a negative charge [15].


Adsorption of nucleic Acid bases, ribose, and phosphate by some clay minerals.

Hashizume H - Life (Basel) (2015)

The layer structure of smectite group.
© Copyright Policy
Related In: Results  -  Collection

License
Show All Figures
getmorefigures.php?uid=PMC4390872&req=5

life-05-00637-f001: The layer structure of smectite group.
Mentions: Smectite is a group including montmorillonite, beidellite, nontronite, saponite, hectorite, sauconite, and stevensite. The general structure of smectite is shown in Figure 1. Montmorillonite, beidellite, and nontronite are called dioctahedral smectite. The octahedral site is normally occupied by trivalent cations (e.g., Al3+, Fe3+, Mn3+). Saponite, hectorite, sauconite, and stevensite are called trioctahedral smectite. The octahedral site usually has divalent cations (e.g., Mg2+, Fe2+, Mn2+, Ni2+). Si4+ and Al3+ are mainly present in the tetrahedral site. One of the typical characteristics of the smectite group is the presence of an exchangeable cation (e.g., Na+, K+, Ca2+) between layers and smectite swells by intercalating water molecules between layers. Smectite can easily disperse in water and the interlayer cations can exchange with ionic organic molecules. Montmorillonite is frequently used in studies of the origin of life. The planar surface usually has a negative charge. The edge surface of montmorillonite has an isoelectric point (pH approximately 7). At pH < 7, the edge surface shows a positive charge and at pH > 7, it has a negative charge [15].

Bottom Line: The interactions of clay minerals with biopolymers, including RNA, have been the subject of many investigations.The behavior of RNA components at clay mineral surfaces needs to be assessed if we are to appreciate how clays might catalyze the formation of nucleosides, nucleotides and polynucleotides in the "RNA world".Here, we review the interactions of some clay minerals with RNA components.

View Article: PubMed Central - PubMed

Affiliation: National Institute for Materials Science, Tsukuba 305-0044, Japan. hashizume.hideo@nims.go.jp.

ABSTRACT
Besides having a large capacity for taking up organic molecules, clay minerals can catalyze a variety of organic reactions. Derived from rock weathering, clay minerals would have been abundant in the early Earth. As such, they might be expected to play a role in chemical evolution. The interactions of clay minerals with biopolymers, including RNA, have been the subject of many investigations. The behavior of RNA components at clay mineral surfaces needs to be assessed if we are to appreciate how clays might catalyze the formation of nucleosides, nucleotides and polynucleotides in the "RNA world". The adsorption of purines, pyrimidines and nucleosides from aqueous solution to clay minerals is affected by suspension pH. With montmorillonite, adsorption is also influenced by the nature of the exchangeable cations. Here, we review the interactions of some clay minerals with RNA components.

No MeSH data available.