| Aspect | Key points | Best supporting citations |
|---|---|---|
| Definition / localization | • Human AKIRIN1 corresponds to Akirin-1 (UniProt Q9H9L7), also called Mighty in earlier literature. • Small akirin-family protein (~200 aa; ~20–25 kDa) with conserved N-terminal nuclear localization signal and predominantly nuclear localization. • Lacks recognizable catalytic domains, supporting a non-enzymatic cofactor/adaptor role rather than enzyme or transporter function. | (pqac-00000016, pqac-00000017, pqac-00000023) |
| Molecular mechanism | • Best-supported model is that Akirin proteins act as transcriptional cofactors that bridge sequence-specific regulators to chromatin-remodeling machinery. • Family-level mechanistic work shows recruitment/stabilization of SWI/SNF/BAF complexes at selected promoters and effects on activating histone marks/chromatin accessibility. • For AKIRIN1 specifically, available mammalian evidence supports promyogenic transcriptional regulation, but direct structural mechanism remains less defined than for AKIRIN2. | (pqac-00000018, pqac-00000020, pqac-00000022) |
| Key partners / complexes | • Family evidence supports interactions with SWI/SNF/BAF components such as BAF60 isoforms and Brg1-associated remodeling machinery. • In inflammatory transcription, Akirin-family proteins cooperate with NF-κB pathway components including IκBζ and p50-linked transcriptional complexes. • AKIRIN1-specific recent disease-oriented evidence also implicates functional linkage to FOXO3/MuRF1 regulation and direct targeting by miR-224 in fibroblasts. | (pqac-00000017, pqac-00000020, pqac-00000022, pqac-00000010) |
| Pathways | • Muscle biology: glucocorticoid → myostatin induction → AKIRIN1 suppression is supported in mouse satellite cells/myoblasts. • Family-level immunity/chromatin work links akirins to NF-κB-selective transcription via SWI/SNF remodeling. • Reviews also place AKIRIN1/Akirin family within broader developmental and signaling contexts including myogenesis, inflammatory signaling, and chromatin-dependent gene regulation. | (pqac-00000007, pqac-00000009, pqac-00000006, pqac-00000017) |
| Phenotypes / biology | • AKIRIN1 is a promyogenic factor: overexpression increases MyoD and myogenin and improves proliferation/differentiation of myoblasts even under dexamethasone stress. • Dex or myostatin lowers AKIRIN1 mRNA/protein, whereas myostatin inhibition restores AKIRIN1 and improves satellite-cell activity, regeneration, and muscle growth. • Akirin1-null mice are reported as viable/outwardly normal, suggesting paralog-specific divergence from the more essential AKIRIN2. | (pqac-00000007, pqac-00000008, pqac-00000011, pqac-00000016) |
| Recent human association evidence (2024) | • In a 2024 human sperm RNA study of 47 idiopathic infertile males, AKIRIN1 RNA elements were among transcripts associated with blastocyst-rate patterns and were plotted against miR-224-5p. • AKIRIN1 was categorized within a “down-same” abundance pattern relative to blastocyst-rate groups and appeared in RE–miRNA overlap analyses, though no AKIRIN1-specific effect size was provided in the excerpt. • Open Targets currently shows modest literature-backed associations for AKIRIN1 with traits/diseases such as aging and atrial fibrillation, but these are association-level rather than mechanism-proving evidence. | (pqac-00000014, pqac-00000015, pqac-00000000) |
| Translational / application notes | • Preclinical muscle studies position AKIRIN1 as a candidate downstream node in glucocorticoid-myostatin muscle wasting and regeneration pathways. • In 2025 human lung-cancer microenvironment work, miR-224 directly targeted AKIRIN1 in fibroblasts, and AKIRIN1 loss promoted pro-metastatic CAF behavior, suggesting biomarker/therapeutic relevance. • Expert reviews emphasize that akirins may offer selective control points for chromatin-coupled transcriptional programs, but direct AKIRIN1-targeted therapies are not yet established. | (pqac-00000007, pqac-00000010, pqac-00000016, pqac-00000018) |


*Table: This table summarizes the main functional annotation points for human/mammalian AKIRIN1, emphasizing its nuclear cofactor role, muscle-related biology, conserved chromatin-remodeling links, and recent human association evidence. It is useful as a compact evidence map connecting core mechanism, biology, and translational relevance.*