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The ATP4A gene encodes the alpha subunit of the gastric H+/K+ ATPase, an enzyme crucial for gastric acid secretion in the stomach. This proton pump resides in the parietal cells of the gastric mucosa and is responsible for exchanging potassium ions (K+) for hydrogen ions (H+), effectively acidifying the stomach contents. ATP4A plays a significant role in maintaining the acidic environment necessary for digestion and defense against pathogens. The ATPase's activity is tightly regulated by various factors, including hormones like gastrin and histamine, to ensure optimal stomach function. Mutations in ATP4A can lead to disorders related to gastric acidity, such as hypochlorhydria (low stomach acid), which can impact digestion and absorption of nutrients. Understanding ATP4A's function and its regulatory mechanisms is essential for developing treatments for conditions like peptic ulcer disease and gastroesophageal reflux disease, where gastric acid secretion is disrupted.
仅用于科研。不用于诊断过程。未经明确授权不得转售。
蛋白别名: ATPase, H+/K+ exchanging, alpha polypeptide; ATPase, H+/K+ transporting, alpha polypeptide; Gastric H(+)/K(+) ATPase subunit alpha; gastric H+/K+ ATPase alpha subunit; gastric H,K-ATPase alpha subunit; gastric H,K-ATPase catalytic subunit; gastric hydrogen-potassium ATPase; H(+)-K(+)-ATPase alpha subunit; H+/K+-ATPase alpha; H+K+-transporting alpha 1; hydrogen/potassium-exchanging ATPase 4A; Potassium-transporting ATPase alpha chain 1; Proton pump
基因别名: ATP4A; ATP6A; Hka; Hkatpc
UniProt ID: (Human) P20648, (Mouse) Q64436
Entrez Gene ID: (Human) 495, (Rat) 24216, (Mouse) 11944