Evidence mapPaperPMID 41534875Full record

ArticleJournal of enzyme inhibition and medicinal chemistry2026

Porcine serum maltase-glucoamylase: structure, kinetics, and inhibition.

Ken Watanabe, Takayoshi Tagami, Chihiro Biwa, Masato Kawasaki, Naruhiko Adachi, Toshio Moriya, Toshiya Senda, Masayuki Okuyama

Abstract read
In one paragraph

Article in Journal of enzyme inhibition and medicinal chemistry, 2026. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Not yet cited in PubMed.

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0citing papers in PubMed
field-weighted citation impact
1 · What the graph read from it

What it found

Each row is one number read from the abstract, on the scale the paper reported it, with its interval. Left of the dashed line favours the treatment, right favours the comparator. Under each row is the sentence it came from. New to these charts? A ten-minute tutorial.

The abstract states no effect estimate the extractor could read, or names no intervention and outcome on the map, so this paper lights no cell and moves no belief. It is still indexed, cited and linked below.

2 · The registry

The trial behind it

Trials whose registry record cites this paper, or whose number appears in the abstract. A trial that started after this paper was published is citing it as background, not reporting it.

Neither the registry nor the abstract names a trial number. If this is a trial report, that itself is worth knowing.

3 · Its place in the literature

Who cites it

0 citing papers in PubMed.

No citing paper in PubMed yet.

4 · The record

Corrections and comments

PubMed lists nothing against this paper. Absence here is not a guarantee, only a check that was made.

5 · Who and what money

Authors and funding

8 authors.

Ken WatanabeResearch Faculty of Agriculture, Hokkaido University, Sapporo, Hokkaido, Japan.
Takayoshi TagamiResearch Faculty of Agriculture, Hokkaido University, Sapporo, Hokkaido, Japan.
Chihiro BiwaResearch Faculty of Agriculture, Hokkaido University, Sapporo, Hokkaido, Japan.
Masato KawasakiStructural Biology Research Center, Institute of Materials Structure Science, High Energy Accelerator Research Organization (KEK), Tsukuba, Ibaraki, Japan.
Naruhiko AdachiStructural Biology Research Center, Institute of Materials Structure Science, High Energy Accelerator Research Organization (KEK), Tsukuba, Ibaraki, Japan.
Toshio MoriyaStructural Biology Research Center, Institute of Materials Structure Science, High Energy Accelerator Research Organization (KEK), Tsukuba, Ibaraki, Japan.
Toshiya SendaStructural Biology Research Center, Institute of Materials Structure Science, High Energy Accelerator Research Organization (KEK), Tsukuba, Ibaraki, Japan.
Masayuki OkuyamaResearch Faculty of Agriculture, Hokkaido University, Sapporo, Hokkaido, Japan.

Funding

No grant is acknowledged in the PubMed record.

6 · The paper itself

Abstract

Maltase-glucoamylase (MGAM) is a small-intestinal enzyme comprising two tandem α-glucosidase units, NtMGAM and CtMGAM, each capable of hydrolysing maltodextrins into glucose. MGAM serves as a therapeutic target for managing postprandial hyperglycaemia; comprehensive insights into its full-length three-dimensional structure and inhibitor kinetics remains limited. Here, we demonstrate that the α-glucosidase in porcine serum is comparable to that encoded by the MGAM gene. Using cryo-electron microscopy, we determined the complex structure of serum MGAM with the inhibitor acarviosyl-maltotriose (AC5), which was found to bind exclusively to the active sites of each unit, confirming the presence of independent catalytic sites. AC5 was shown to exhibit mixed-type inhibition towards full-length serum MGAM and competitive inhibition against both recombinant NtMGAM and CtMGAM. The apparent mixed-type inhibition can be more accurately attributed to dual competitive inhibition mechanisms. These findings contribute to the advancement of functional foods and therapeutic interventions for postprandial hyperglycaemia and type 2 diabetes.

Indexed as

alpha-GlucosidasesGlycoside Hydrolase InhibitorsTrisaccharidesAnimalsDose-Response Relationship, DrugKineticsMolecular StructureStructure-Activity RelationshipSwinealpha-GlucosidasesGlycoside Hydrolase InhibitorsTrisaccharidesAcarbose derivativecryo-electron microscopyinhibition mechanismmaltase-glucoamylasetype 2 diabetes

Identifiers

PMID41534875
PMCPMC12805851

What Socratic holds

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LicenceCC BY-NC
Read underepoch 390

Registered trials

None linked

Read under generation 80e0d062 · epoch 390. Bibliography from PubMed, PubMed Central and OpenAlex; grants from NIH RePORTER; trial links from ClinicalTrials.gov; estimates, votes and beliefs from the Socratic graph.