RPS23 rs1354123: Genetics, Stress Response, and Biology
The genetic variant rs1354123 is a single nucleotide polymorphism located in the genomic region of the RPS23 gene on chromosome 5. Functional genomic studies indicate that this variant acts as an expression quantitative trait locus, modulating the expression of RPS23 in human neural cells under glucocorticoid and hydrocortisone stress conditions. While it highlights a link between cellular translation machinery and physiological stress signaling, its direct clinical consequences remain under active investigation.
What each genotype means
Typical neuronal stress response
You carry two copies of the C allele, which is associated with baseline transcriptional regulation of the RPS23 gene under resting conditions. Experimental studies indicate that glucocorticoid hormone exposure typically leads to standard expression patterns rather than the stress-attenuated response linked to the minor allele. This reflects cellular-level gene expression changes in laboratory models and does not represent a medical diagnosis or disease risk.
Carried by approximately 45% of individuals worldwide, making it the most common genotype across most continental ancestries.
Intermediate stress-dependent expression
You carry one copy of the T allele, which functions as an expression quantitative trait locus (eQTL) altering RPS23 expression in human neuronal models exposed to glucocorticoid stress. Research suggests an intermediate regulatory profile where ribosomal gene responsiveness to stress hormones differs slightly from the baseline genotype. Current evidence is derived primarily from in vitro neuronal systems and does not imply a clinical condition.
Carried by roughly 44% of individuals globally, reflecting a minor allele frequency of approximately 0.33.
Altered stress-dependent regulation
You carry two copies of the T allele, which has been shown in functional cellular studies to alter RPS23 expression in human neurons following exposure to hydrocortisone or glucocorticoids. This regulatory variant modulates how cellular translation machinery responds to physiological stress cues at the molecular level. Because research is focused on cellular and molecular phenotypes, these statistical associations do not serve as a clinical evaluation or medical diagnosis.
Carried by about 11% of individuals globally, occurring as the homozygous minor genotype across diverse populations.
Genomic Location and Variant Characteristics
The single nucleotide polymorphism rs1354123 is situated on chromosome 5 in proximity to the RPS23 locus. Cataloged in reference repositories such as dbSNP, the polymorphism involves a single base substitution, typically presenting as alleles C and T (with strand-dependent annotations varying between reference databases). Unlike coding missense mutations that directly alter an amino acid chain, rs1354123 functions primarily within non-coding regulatory sequences. Its physical position places it in a region susceptible to chromatin remodeling and transcription factor binding, particularly when cells encounter physiological cues. In molecular genetics, such variants are evaluated for their potential to alter transcription factor affinity or RNA stability rather than directly modifying protein structure. Consequently, rs1354123 is categorized as an expression quantitative trait locus (eQTL) rather than a damaging structural mutation.
Biological Function of the RPS23 Gene
The RPS23 gene encodes ribosomal protein S23, also referred to as universal ribosomal protein uS12, an integral structural component of the small 40S ribosomal subunit. Ribosomal proteins are essential across all living organisms, playing a fundamental role in cytoplasmic protein synthesis, reading mRNA transcripts, and maintaining the fidelity of the translation process. Rare structural or coding mutations in RPS23 have previously been cataloged in resources like UniProt and ClinVar in connection with rare developmental syndromes and ribosomopathies. Beyond basic housekeeping translation, specific ribosomal proteins participate in cellular adaptation to metabolic challenges, inflammatory cues, and neuroendocrine signaling. In neural tissues, dynamic regulation of protein synthesis components like RPS23 allows neurons to adjust their translational output, synaptic remodeling, and homeostasis in response to fluctuating biological environments.
Glucocorticoid Signaling and the Stress Response
Functional profiling of rs1354123 has identified it as a stress-dependent regulatory variant. In cellular models of human neurons subjected to elevated glucocorticoids, such as hydrocortisone, the presence of specific alleles at rs1354123 correlates with differential expression levels of RPS23 transcript. Glucocorticoids represent the primary hormonal output of the hypothalamic-pituitary-adrenal (HPA) axis, acting via glucocorticoid receptors to modulate wide transcriptional networks during acute and chronic stress. Research demonstrates that the regulatory effect of rs1354123 is largely latent under baseline conditions and becomes prominent primarily during cellular exposure to hormonal stress signals. This points to an interaction between host genetic variation and external neuroendocrine stimuli. However, the evidence connecting this in vitro regulatory response to complex behavioral phenotypes or psychiatric conditions is rated as moderate, as cellular eQTL effects do not always directly translate into systemic clinical outcomes.
Interpreting Results in Everyday Life
Discovering an individual genotype at rs1354123 provides insight into basic human biological variability rather than a clinical prognosis. This variant is not diagnostic of any medical disorder, anxiety condition, or adrenal dysfunction. Because it is an expression-modulating polymorphism rather than a high-penetrance disease allele, harboring one or two copies of a particular allele simply reflects a common biochemical nuance in stress-pathway gene regulation. Individuals should not attempt to alter lifestyle, mental health therapies, or medication regimens based on rs1354123 data alone. Anyone reviewing personal genomic profiles in the context of persistent stress, mental well-being, or corticosteroid therapy should interpret these findings as educational background and consult a qualified medical provider or genetic counselor for personal health evaluation.
How common is this variant?
The minor allele at rs1354123 has an estimated frequency of approximately 0.33 (33%) across global populations according to gnomAD and dbSNP datasets. As a result, heterozygous and homozygous genotypes are widely distributed and frequently encountered across diverse ancestral backgrounds.
Frequently asked questions
Does having the rs1354123 variant mean I handle stress poorly?
No. The rs1354123 variant has been observed to alter RPS23 gene expression in human neural cells exposed to hydrocortisone in laboratory experiments, but this does not correlate directly to everyday psychological stress tolerance. Human stress responses depend on complex interactions between hundreds of genetic loci, life events, environment, and physical health.
Is rs1354123 linked to any diagnosed disease?
Currently, rs1354123 is classified as a regulatory variant (eQTL) and is not recognized by ClinVar or clinical genetics guidelines as a causative mutation for any disorder. While coding mutations in the RPS23 gene can cause rare developmental conditions, common non-coding variants like rs1354123 simply reflect widespread natural variation.
How does RPS23 interact with cortisol and other steroids?
When the body encounters stress, cortisol binds to glucocorticoid receptors that act as transcription factors inside cells. Studies suggest that rs1354123 alters the sensitivity of the local chromatin or promoter region near RPS23, leading to differential expression of ribosomal protein S23 during steroid exposure in neuronal tissues.
Can I modify my medication or supplements based on my rs1354123 result?
No. There are no clinical pharmacogenomic guidelines (such as those from CPIC or PharmGKB) that recommend altering any prescription drug or supplement dosage based on rs1354123. Any questions regarding medications, including corticosteroid treatments, should always be discussed directly with a physician or pharmacist.
Sources & further reading
Educational information only, last refreshed 9/13/2026. Not medical advice — these associations describe population statistics, not individual predictions.
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