GO:0005384 manganese ion transmembrane transporter activity: Mechanism, Genes and Research Methods
Research-grade guide for scientists and biopharma professionals
Key Takeaways
• GO:0005384 describes the molecular function that enables transfer of manganese (Mn) ions across a membrane, a process essential for metal homeostasis, antioxidant defense, and metabolic enzyme activation.
• Manganese transporters fall into several protein families, including TerC/Alx, SLC30A10, TMEM165, and ABC-type importers such as MntBC-A, each with distinct structural and regulatory features.
• Structural studies show that transmembrane helices, metal-binding residues, and hydrophobic plugs control ion selectivity and transport direction.
• Dysregulation of manganese transport is linked to neurological disease, liver pathology, and altered metal homeostasis in metabolic disorders.
• CRISPR knockout, point-mutation, knock-in, and overexpression models are powerful tools to dissect the causal roles of manganese transporter genes in cells and organisms.
• Combining genetic models with biochemical transport assays, imaging, and transcriptomics provides a rigorous framework for studying GO:0005384 in health and disease.
Description
Manganese (Mn) is an essential trace metal that serves as a cofactor for enzymes involved in antioxidant defense, amino acid metabolism, and glycosylation. Because excess or insufficient Mn can be toxic, cells tightly control its movement across membranes. The Gene Ontology molecular function GO:0005384, manganese ion transmembrane transporter activity, captures the proteins that mediate this transfer. Understanding this activity is fundamental for researchers studying metal homeostasis, organelle function, and disease mechanisms. The activity is carried out by diverse transporter families, including proton-dependent transporters, cation diffusion facilitators, and ABC transporters. Each family uses distinct structural elements to recognize Mn and move it across lipid bilayers. For example, the Escherichia coli proton-dependent manganese transporter uses transmembrane segment 6 to form an ion channel-like pathway, while the mammalian SLC30A10 requires specific transmembrane and cytoplasmic domains for Mn efflux. These molecular details are critical for interpreting physiological roles and for designing experiments that test causality. In this article, we integrate authoritative GO annotation with published literature to provide a research-grade overview of GO:0005384, its key genes, regulatory features, disease connections, and the experimental methods used to study it.
manganese ion transmembrane transporter activity At A Glance
| GO ID | GO:0005384 |
|---|---|
| GO term | manganese ion transmembrane transporter activity |
| Ontology | molecular_function |
| Synonym | none |
| Major function | Transfer of manganese ions across biological membranes |
| Representative protein families | TerC/Alx, SLC30A10, TMEM165, ABC transporters (e.g., MntBC-A) |
| Directionality | Can mediate import or efflux depending on the protein and cellular context |
| Cofactors/energy | Some transporters use proton gradients or ATP hydrolysis; others are facilitated diffusion or antiporters |
| Disease relevance | Neurological disorders, liver disease, and metal homeostasis imbalances |
What Is GO:0005384?
GO:0005384, manganese ion transmembrane transporter activity, is a molecular function that enables the transfer of manganese (Mn) ions from one side of a membrane to the other. This activity is essential for maintaining Mn homeostasis within cells and organelles, and it is performed by integral membrane proteins that form channels, carriers, or pumps.
Why Is manganese ion transmembrane transporter activity Important in Cell Biology?
Manganese ion transmembrane transporter activity is critical because Mn is both essential and potentially toxic. Cells must precisely regulate Mn uptake, distribution, and efflux to support enzymes such as superoxide dismutase and glycosyltransferases while avoiding Mn-induced neurotoxicity. Defects in Mn transporters are associated with human diseases, including hereditary parkinsonism and liver cirrhosis linked to SLC30A10 mutations, and congenital disorders of glycosylation linked to TMEM165. Therefore, studying GO:0005384 provides mechanistic insight into metal homeostasis and identifies therapeutic targets.
• Maintains intracellular Mn homeostasis to support antioxidant enzymes and metabolic pathways.
• Prevents Mn toxicity, which can cause neurological damage and liver disease.
• Enables proper glycosylation in the Golgi via TMEM165-mediated Mn transport.
• Supports bacterial survival and virulence through Mn import systems like MntBC-A.
• Contributes to metal selectivity and transport direction, as shown for SLC30A10 and Alx.
• Provides targets for understanding hereditary disorders of metal metabolism.
• Offers a model system for studying membrane protein structure-function relationships.
• Links to broader metal crosstalk, including copper and zinc homeostasis.
• Facilitates development of CRISPR-based disease models for transporter dysfunction.
• Informs bioinformatics and library screening approaches for metal transporter discovery.
What Happens During manganese ion transmembrane transporter activity?
Substrate recognition and binding
In simple terms: The transporter first grabs the manganese ion.
Manganese transporters must selectively recognize Mn ions among other divalent cations. In SLC30A10, specific transmembrane and cytoplasmic domains are required for Mn efflux activity, and a putative metal-binding site in the transmembrane domain differs from that of related zinc transporters. In the Bacillus anthracis ABC transporter MntBC-A, titratable transmembrane residues and a hydrophobic plug are essential for manganese import. These structural features ensure that the correct ion is bound and prepared for translocation.
Conformational changes and translocation
In simple terms: The protein changes shape to move the ion across the membrane.
After binding, transporters undergo conformational changes that shuttle Mn across the lipid bilayer. The Escherichia coli proton-dependent manganese transporter uses transmembrane segment 6 to form an ion channel-like structure, as shown by ion channel activity of that segment. In TMEM165, a Golgi calcium/manganese-proton antiporter, the transport cycle is coupled to proton exchange, which drives Mn movement into the Golgi lumen. These dynamic transitions are often regulated by pH and membrane potential.
Energy coupling and directionality
In simple terms: Some transporters use energy to push manganese in one direction.
Manganese transport can be driven by proton gradients, ATP hydrolysis, or concentration gradients. The MntBC-A ABC transporter from Bacillus anthracis uses ATP to import Mn. In contrast, SLC30A10 functions as an efflux transporter, likely using the electrochemical gradient to export Mn from cells. The TerC family transporter Alx in Escherichia coli is controlled by a riboswitch and tunes intracellular manganese concentration at alkaline pH, indicating that environmental conditions influence transport direction and capacity.
Regulation and feedback
In simple terms: Cells adjust manganese transport based on need.
Manganese transporter activity is regulated at multiple levels. In E. coli, the Alx transporter is controlled by a riboswitch that responds to Mn levels, allowing feedback regulation. In mammalian cells, SLC30A10 activity is modulated by its structural elements, and mutations in these domains alter efflux capacity. TMEM165 function is linked to Golgi homeostasis, and its disruption affects glycosylation, suggesting that transport activity is integrated with organelle function.
Key Genes Involved in GO:0005384 manganese ion transmembrane transporter activity
The following genes and proteins represent key players in manganese ion transmembrane transporter activity, based on published experimental evidence.
| Gene | Major Role | Research Relevance |
|---|---|---|
| SLC30A10 | Manganese efflux transporter | Mutations cause hereditary parkinsonism and liver disease; structural determinants of efflux studied |
| TMEM165 | Golgi calcium/manganese-proton antiporter | Defects cause congenital disorders of glycosylation; Mn transport in Golgi |
| Alx | TerC family Mn transporter in E. coli | Riboswitch-controlled, tunes Mn at alkaline pH |
| mntB | ABC transporter permease for Mn import | Essential for Bacillus anthracis Mn uptake; hydrophobic plug and titratable residues |
| mntC | ABC transporter substrate-binding protein | Binds Mn for import via MntBC-A |
| mntA | ABC transporter ATPase | Provides energy for Mn import |
| mntH | Proton-dependent Mn transporter (Nramp family) | Model for proton-coupled Mn transport; transmembrane segment 6 channel activity |
| SLC39A8 | Zinc/manganese importer | Studied in metal homeostasis; assayed with in vitro transport |
| SLC39A14 | Manganese importer | Linked to Mn homeostasis and disease; transport assays |
| SLC30A1 | Zinc transporter | Related to SLC30A10; used for comparative metal transport studies |
| SLC30A2 | Zinc transporter | Comparative model for SLC30A10 metal binding |
| SLC30A3 | Zinc transporter | Comparative model for SLC30A10 metal binding |
| SLC30A8 | Zinc transporter | Studied in diabetes and metal homeostasis |
| ATP7A | Copper transporter | Copper homeostasis crosstalk with Mn; diabetes context |
| ATP7B | Copper transporter | Copper homeostasis crosstalk; diabetes context |
| CTR1 | Copper importer | Copper homeostasis; related metal transport |
| MT1 | Metallothionein | Metal buffering; copper and manganese crosstalk |
How Is manganese ion transmembrane transporter activity Regulated?
Manganese ion transmembrane transporter activity is regulated by multiple mechanisms. In bacteria, the Alx transporter is controlled by a riboswitch that senses intracellular manganese, providing feedback regulation at alkaline pH. In mammals, SLC30A10 efflux activity depends on specific transmembrane and cytoplasmic domains, and mutations in these regions alter transport capacity. TMEM165 activity is tied to Golgi pH and calcium/manganese homeostasis, and its dysfunction affects glycosylation pathways. Additionally, metal crosstalk with copper and zinc transporters can influence manganese transport indirectly, as seen in diabetes-related studies.
manganese ion transmembrane transporter activity and Human Disease
| Gene | Disease / Biology | Potential Experimental Model |
|---|---|---|
| SLC30A10 | Hereditary parkinsonism, liver cirrhosis | Knockout and point-mutation models in cell lines and animal models |
| TMEM165 | Congenital disorders of glycosylation | Knockout and knock-in of patient mutations in HeLa or HEK293 cells |
| Alx | Bacterial Mn homeostasis at alkaline pH | Riboswitch reporter and knockout in E. coli |
| mntB/mntC | Bacterial virulence and Mn import | Deletion mutants in Bacillus anthracis |
| SLC39A8 | Metal homeostasis and neurodevelopment | Overexpression and transport assays in mammalian cells |
SLC30A10 and manganese-related parkinsonism
Mutations in SLC30A10 cause a hereditary form of parkinsonism with hypermanganesemia and liver cirrhosis. Structural studies have identified transmembrane and cytoplasmic domains required for Mn efflux, and a putative metal-binding site that differs from related zinc transporters. These findings link impaired manganese efflux directly to neurological and hepatic disease.
TMEM165 and congenital disorders of glycosylation
TMEM165 is a Golgi calcium/manganese-proton antiporter. Defects in TMEM165 lead to congenital disorders of glycosylation, highlighting the role of manganese transport in Golgi function and protein glycosylation. This connects GO:0005384 to organelle-specific disease mechanisms.
Metal homeostasis in diabetes mellitus
Copper and manganese homeostasis are altered in diabetes mellitus, and transporters such as SLC30A8 and ATP7A/ATP7B have been implicated in disease biology. Although direct manganese transport defects in diabetes are less defined, the crosstalk between metal transporters suggests that GO:0005384 may contribute to metabolic dysregulation.
From manganese ion transmembrane transporter activity-Related Genes to Experimental Models
| Research Question | Suitable Model |
|---|---|
| Does loss of SLC30A10 impair manganese efflux? | CRISPR knockout in HepG2 or SH-SY5Y cells |
| How do point mutations in SLC30A10 affect transport? | Point-mutation knock-in via CRISPR in cell lines |
| What is the role of TMEM165 in Golgi Mn transport? | Knockout and tagged knock-in in HeLa cells |
| How does Alx respond to manganese levels? | Riboswitch reporter and knockout in E. coli |
| Can MntBC-A import be measured biochemically? | Overexpression and proteoliposome assays |
| Does SLC39A8 mediate manganese uptake? | Overexpression in HEK293 cells and transport assays |
How to Study the manganese ion transmembrane transporter activity Process
| Method | What It Measures | Typical Application |
|---|---|---|
| In vitro transport assay | Manganese flux across membranes | Characterizing SLC30A10 or SLC39A8 activity |
| Site-directed mutagenesis | Effect of specific residues on transport | Mapping metal-binding sites in SLC30A10 |
| Electrophysiology | Ion channel activity | Transmembrane segment 6 of E. coli Mn transporter |
| Fluorescent Mn sensors | Intracellular Mn levels | Live-cell imaging of Golgi or cytoplasm |
| Riboswitch reporter | Translational regulation by Mn | Alx regulation in E. coli |
| Proteoliposome assays | Transport in defined lipid environment | MntBC-A ABC transporter |
| RNA-seq | Transcriptional changes | Metal stress responses |
| CRISPR screening | Gene essentiality in Mn transport | Identifying novel transporters |
Transport assays
In vitro transport assays using proteoliposomes or intact cells are used to measure manganese flux. For example, SLC30A10 efflux activity was characterized using such assays, and zinc transporter assays provide a template for metal transport measurements. These methods directly quantify GO:0005384 activity.
Structural and mutational analysis
Site-directed mutagenesis combined with transport assays identifies residues critical for Mn binding and translocation. Studies on SLC30A10 and MntBC-A have used this approach to define transmembrane elements and hydrophobic plugs. Ion channel activity of transmembrane segment 6 of the E. coli proton-dependent Mn transporter was demonstrated using electrophysiology.
Imaging and organelle-specific probes
Genetically encoded fluorescent sensors and organelle-targeted probes can monitor manganese levels in live cells. TMEM165 studies have used Golgi-specific readouts to link transport to glycosylation. These imaging approaches provide spatial and temporal resolution of Mn dynamics.
Transcriptomics and riboswitch reporters
RNA-seq and riboswitch-based reporters reveal how manganese transporters are regulated at the transcriptional and post-transcriptional levels. The Alx riboswitch in E. coli is a prime example of a manganese-responsive regulatory element. Such methods help connect GO:0005384 to cellular stress responses.
How CRISPR Can Be Used to Study GO:0005384 manganese ion transmembrane transporter activity
Knockout
CRISPR knockout of manganese transporter genes such as SLC30A10 or TMEM165 allows researchers to assess loss-of-function phenotypes, including impaired Mn efflux, altered glycosylation, and disease-related cellular changes. Knockout models are essential for establishing causality.
Point Mutation
Introducing disease-associated point mutations into endogenous loci via CRISPR base editing or homology-directed repair can reveal how specific residues affect transport activity. For example, mutations in the transmembrane domain of SLC30A10 alter Mn efflux. Such models provide mechanistic insight into GO:0005384.
Knock-in
Knock-in of tagged transporters (e.g., GFP or HA) enables localization and interaction studies. Tagged TMEM165 or SLC30A10 can be used to monitor organelle-specific transport and protein trafficking. This approach preserves endogenous regulation.
Overexpression
Overexpression of manganese transporters such as SLC39A8 or MntBC-A in heterologous systems facilitates biochemical purification and transport assays. Overexpression can also model gain-of-function states or metal overload.
How EDITGENE Supports manganese ion transmembrane transporter activity Research
Researchers studying manganese ion transmembrane transporter activity-related genes often need to determine whether a candidate gene is causally involved in metal homeostasis, organelle function, or disease. EDITGENE provides a comprehensive suite of CRISPR-based services to generate precisely engineered cell models, enabling rigorous functional studies of GO:0005384.
Contact EDITGENE today to design your custom CRISPR model for manganese ion transmembrane transporter activity research.
Frequently Asked Questions About manganese ion transmembrane transporter activity
What is GO:0005384?
GO:0005384 is the Gene Ontology molecular function term for manganese ion transmembrane transporter activity, which enables the transfer of manganese ions across a membrane.
What genes are involved in manganese ion transmembrane transporter activity?
Key genes include SLC30A10, TMEM165, Alx, mntB, mntC, mntA, and SLC39A8, among others.
How is manganese transported across membranes?
Manganese is transported by integral membrane proteins that use conformational changes, proton gradients, or ATP hydrolysis to move the ion.
What diseases are linked to manganese transporters?
Mutations in SLC30A10 cause parkinsonism and liver cirrhosis, while TMEM165 defects cause congenital disorders of glycosylation.
What is the role of SLC30A10 in manganese homeostasis?
SLC30A10 is a manganese efflux transporter; its transmembrane and cytoplasmic domains are required for activity.
How can I study manganese ion transmembrane transporter activity?
Common methods include in vitro transport assays, site-directed mutagenesis, electrophysiology, and fluorescent sensors.
What is TMEM165?
TMEM165 is a Golgi calcium/manganese-proton antiporter involved in glycosylation and manganese homeostasis.
Can CRISPR be used to study manganese transporters?
Yes, CRISPR knockout, point mutation, knock-in, and overexpression models are powerful tools for dissecting transporter function.
What is the Alx transporter?
Alx is a TerC family manganese transporter in E. coli regulated by a riboswitch, important for Mn homeostasis at alkaline pH.
Why is manganese transport important for cells?
Manganese is a cofactor for antioxidant and metabolic enzymes, but excess Mn is toxic, so transport must be tightly regulated.
Conclusion
GO:0005384, manganese ion transmembrane transporter activity, is a fundamental molecular function that maintains manganese homeostasis across all domains of life. Structural and functional studies have revealed diverse mechanisms, from proton-coupled channels to ATP-driven ABC transporters. Dysregulation of these transporters is linked to neurological, hepatic, and glycosylation disorders. CRISPR-based models and biochemical assays provide robust tools to investigate these processes. EDITGENE offers comprehensive services to accelerate research on manganese transporters and their roles in health and disease.
References
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- 2. Zogzas CE et al.. 2016. Structural Elements in the Transmembrane and Cytoplasmic Domains of the Metal Transporter SLC30A10 Are Required for Its Manganese Efflux Activity.. J Biol Chem 291(31):15940-57 PMID: 27307044
- 3. Jankauskas SS et al.. 2024. Insights into molecular and cellular functions of the Golgi calcium/manganese-proton antiporter TMEM165.. J Biol Chem 300(8):107567 PMID: 39002685
- 4. Lowe J et al.. 2017. Dissecting copper homeostasis in diabetes mellitus.. IUBMB Life 69(4):255-262 PMID: 28276155
- 5. Zogzas CE et al.. 2018. Putative metal binding site in the transmembrane domain of the manganese transporter SLC30A10 is different from that of related zinc transporters.. Metallomics 10(8):1053-1064 PMID: 29989630
- 6. Sharma R et al.. 2024. A riboswitch-controlled TerC family transporter Alx tunes intracellular manganese concentration in Escherichia coli at alkaline pH.. J Bacteriol 206(7):e0016824 PMID: 38869303
- 7. Ben Yosef TE et al.. 2023. Characterizing Mammalian Zinc Transporters Using an In Vitro Zinc Transport Assay.. J Vis Exp PMID: 37335097
- 8. Kuznetsova A et al.. 2021. Titratable transmembrane residues and a hydrophobic plug are essential for manganese import via the Bacillus anthracis ABC transporter MntBC-A.. J Biol Chem 297(4):101087 PMID: 34416234
