{"id":7477,"date":"2025-12-30T07:37:10","date_gmt":"2025-12-30T07:37:10","guid":{"rendered":"https:\/\/fermentorchina.com\/?p=7477"},"modified":"2026-03-05T08:25:22","modified_gmt":"2026-03-05T08:25:22","slug":"fermentation-experience-of-pichia-pastoris","status":"publish","type":"post","link":"https:\/\/fermentorchina.com\/es\/fermentation-experience-of-pichia-pastoris\/","title":{"rendered":"Fermentation Experience of Pichia pastoris"},"content":{"rendered":"

Pichia pastoris is a type of methylotrophic yeast that can utilize methanol as its sole carbon and energy source.<\/p>\n

Like other yeasts, it exists mainly in the haploid form during the asexual growth phase. When environmental nutrients are limited, it often induces the mating of two haploid cells of different physiological mating types, which fuse to form diploid cells.<\/p>\n

\"Pichia-pastoris\"<\/p>\n

I. Production Process of Pichia pastoris<\/h2>\n

1\u3001Cell proliferation and propagation<\/p>\n

2\u3001Fed-batch transition phase (glycerol or glucose)<\/p>\n

3\u3001Induction expression phase (methanol)<\/p>\n

Carbon sources in each phase serve as limiting substrates, and the kinetic model of their feeding rate is the basis for high-efficiency expression.<\/p>\n

\"Pichia-pastoris-production-process\"<\/p>\n

II. Advantages and Disadvantages of Pichia pastoris<\/h2>\n

Pichia pastoris has no natural plasmids in its cells, so expression vectors must undergo homologous recombination with the host chromosome to integrate the exogenous gene expression cassette into the chromosome for exogenous gene expression. The expression cassette includes a promoter, exogenous gene cloning site, termination sequence, selection marker, etc.<\/p>\n

All expression vectors are shuttle plasmids, which are first replicated and amplified in Escherichia coli and then introduced into host yeast cells. To secrete products extracellularly, the expression vector also needs to carry a signal peptide sequence.<\/p>\n

Ventajas<\/strong><\/h4>\n

1\u3001It harbors the alcohol oxidase AOX1 gene promoter, one of the strongest and most strictly regulated promoters known to date.<\/p>\n

2\u3001High expression efficiency: exogenous proteins expressed can account for over 90% of the total expressed proteins, facilitating the separation and purification of target proteins.<\/p>\n

3\u3001High-density culture can be achieved in simple synthetic media.<\/p>\n

4\u3001Expression plasmids can be stably integrated into specific genomic loci in single or multiple copies.<\/p>\n

5\u3001Since this yeast can use methanol as the sole carbon and energy source\u2014while most microorganisms cannot\u2014contamination risks are reduced.<\/p>\n

Desventajas<\/h4>\n

1\u3001Long fermentation cycle.<\/p>\n

2\u3001Methanol is flammable, explosive and toxic, posing certain safety hazards.<\/p>\n

3\u3001Drugs used for screening high-yield strains are relatively expensive.<\/p>\n

4\u3001Immature culture media and conditions.<\/p>\n

III. Influencing Factors of Pichia pastoris Fermentation<\/h2>\n

Generally, the key influencing factors include glucose concentration, temperature, pH, dissolved oxygen, nitrogen source, nutrients and bacterial concentration itself.<\/p>\n

\"5L-GJ-4<\/p>\n

Temperatura<\/h4>\n

Except for a few special strains, most yeasts grow best at 20\u201325\u00b0C. Also, higher temperatures help stop microbial contamination.<\/p>\n

Pichia pastoris has an optimal fermentation temperature of 30\u00b0C. Its growth temperature range is 25\u201330\u00b0C. Industrial fermentation is usually controlled between 30\u201335\u00b0C. Yeast grows and reproduces normally in this range. If the temperature goes beyond this range, higher temperatures make enzymes lose activity faster. They also make yeast cells age sooner. This shortens the fermentation cycle. It affects target protein expression.<\/p>\n

pH<\/h4>\n

Pichia pastoris can live in a wide pH range (2.0\u20137.5). The right pH is different for different protein types. Different proteins also have different tolerances to various proteases. Choosing a proper pH helps cells grow. It also stops protease activity. This prevents target protein degradation.<\/p>\n

In industrial production, pH is usually controlled at 4.5\u20135.5. Ammonia water is often added online during fermentation. It adjusts pH. It also acts as a nitrogen source. It helps bacteria grow faster. It makes sure target products are fully expressed.<\/p>\n

Glucose Concentration<\/h4>\n

Experiments show something. When the initial glucose concentration is over 25 g\/L, bacterial yield goes down slowly. This shows high glucose concentration stops cell growth a lot. Pichia pastoris grows fastest when the initial glucose concentration is about 20 g\/L.<\/p>\n

Dissolved Oxygen (DO)<\/h4>\n

Pichia pastoris is an aerobic microorganism. It needs oxygen for growth and metabolism. Dissolved oxygen is one of the most important monitoring indicators during yeast growth.<\/p>\n

Low DO levels mean cells are using carbon sources in the broth. A DO rebound means carbon sources are used up. Cells are hungry. You need to add carbon sources in time. If there is not enough oxygen, cell growth is limited. If DO is too high, toxic oxygen free radicals form in the broth. They kill yeast cells. DO is usually kept at 30% during fermentation. It is kept at 20% during the induction phase.<\/p>\n

Bacterial Concentration<\/h4>\n

Studies look at fermentation performance with different initial yeast concentrations. They show initial concentration has a big impact on Pichia pastoris fermentation. Lower initial concentrations make cell growth faster. But they make protein expression less. Higher initial concentrations make substrate use slower. But they make protein concentration and yield higher. This is because yeast uses substrates for protein expression. It does not use them for cell growth.<\/p>\n

During the methanol induction phase, cells should reach a high concentration before induction. This helps them adapt to the methanol environment. It reduces methanol toxicity. Now, people stop feeding to start methanol induction. This happens when the wet cell weight reaches 180\u2013220 g\/L.<\/p>\n

Nitrogen Source<\/h4>\n

In industrial production, organic nitrogen sources (e.g., peptone) are used in seed media. During fermentation, large amounts of ammonia water are added for pH adjustment, which also acts as a nitrogen source to support rapid yeast growth.<\/p>\n

Inorganic Salts<\/h4>\n

Essential inorganic salts for Pichia pastoris include CaCl\u2082, MgSO\u2084, K\u2082SO\u2084, KH\u2082PO\u2084 and K\u2082HPO\u2084. Trace elements (zinc, cobalt, manganese, molybdenum, copper, iron, etc.) are also indispensable\u2014they serve as enzyme cofactors or activators. Low concentrations of these trace elements promote yeast growth and product synthesis, while high concentrations cause toxicity and inhibition.<\/p>\n

\"SJA\"<\/p>\n

Sobre Bailun<\/h2>\n

Bailun<\/a> boasts extensive experience in manufacturing various bioreactors and pressure vessels. Equipped with a professional team of experts in bioreaction, fermentation technology, mechanical manufacturing and automatic control, our R&D and technological capabilities remain leading domestically and world-class internationally. We are committed to providing you with a reassuring, reliable and satisfactory product experience. Cont\u00e1ctenos<\/u><\/a><\/p>","protected":false},"excerpt":{"rendered":"

Pichia pastoris is a type of methylotrophic yeast that can utilize methanol as its sole carbon and energy source. Like other yeasts, it exists mainly in the haploid form during the asexual growth phase. When environmental nutrients are limited, it often induces the mating of two haploid cells of different physiological mating types, which fuse […]<\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"site-sidebar-layout":"default","site-content-layout":"","ast-site-content-layout":"default","site-content-style":"default","site-sidebar-style":"default","ast-global-header-display":"","ast-banner-title-visibility":"","ast-main-header-display":"","ast-hfb-above-header-display":"","ast-hfb-below-header-display":"","ast-hfb-mobile-header-display":"","site-post-title":"","ast-breadcrumbs-content":"","ast-featured-img":"","footer-sml-layout":"","ast-disable-related-posts":"","theme-transparent-header-meta":"default","adv-header-id-meta":"","stick-header-meta":"","header-above-stick-meta":"","header-main-stick-meta":"","header-below-stick-meta":"","astra-migrate-meta-layouts":"set","ast-page-background-enabled":"default","ast-page-background-meta":{"desktop":{"background-color":"","background-image":"","background-repeat":"repeat","background-position":"center center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-opacity":"","overlay-gradient":""},"tablet":{"background-color":"","background-image":"","background-repeat":"repeat","background-position":"center center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-opacity":"","overlay-gradient":""},"mobile":{"background-color":"","background-image":"","background-repeat":"repeat","background-position":"center center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-opacity":"","overlay-gradient":""}},"ast-content-background-meta":{"desktop":{"background-color":"var(--ast-global-color-5)","background-image":"","background-repeat":"repeat","background-position":"center center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-opacity":"","overlay-gradient":""},"tablet":{"background-color":"var(--ast-global-color-5)","background-image":"","background-repeat":"repeat","background-position":"center center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-opacity":"","overlay-gradient":""},"mobile":{"background-color":"var(--ast-global-color-5)","background-image":"","background-repeat":"repeat","background-position":"center center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-opacity":"","overlay-gradient":""}},"footnotes":""},"categories":[1],"tags":[],"class_list":["post-7477","post","type-post","status-publish","format-standard","hentry","category-bailun"],"_links":{"self":[{"href":"https:\/\/fermentorchina.com\/es\/wp-json\/wp\/v2\/posts\/7477","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/fermentorchina.com\/es\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/fermentorchina.com\/es\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/fermentorchina.com\/es\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/fermentorchina.com\/es\/wp-json\/wp\/v2\/comments?post=7477"}],"version-history":[{"count":3,"href":"https:\/\/fermentorchina.com\/es\/wp-json\/wp\/v2\/posts\/7477\/revisions"}],"predecessor-version":[{"id":7746,"href":"https:\/\/fermentorchina.com\/es\/wp-json\/wp\/v2\/posts\/7477\/revisions\/7746"}],"wp:attachment":[{"href":"https:\/\/fermentorchina.com\/es\/wp-json\/wp\/v2\/media?parent=7477"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/fermentorchina.com\/es\/wp-json\/wp\/v2\/categories?post=7477"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/fermentorchina.com\/es\/wp-json\/wp\/v2\/tags?post=7477"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}