Cited by 51Cellular transport and secretionmelanin and skin pigmentationCalcium signaling and nucleotide metabolism

Functional involvement of Rab1A in microtubule-dependent anterograde melanosome transport in melanocytes

Open access
Ishida, Morié, Ohbayashi, Norihiko, Maruta, Yuto, Ebata, Yuka, Fukuda, Mitsunori·2012·Journal of Cell Science

Abstract

Melanosomes are transported to the cell periphery of melanocytes by coordination between bidirectional microtubule-dependent movements and unidirectional actin-dependent movement. Although both the mechanism of the actin-dependent melanosome transport and the mechanism of the microtubule-dependent retrograde melanosome transport in mammalian skin melanocytes have already been determined, almost nothing is known about the mechanism of the microtubule-dependent anterograde melanosome transport. Small GTPase Rab proteins are common regulators of membrane traffic in all eukaryotes, and in this study we performed genome-wide screening for Rab proteins that are involved in anterograde melanosome transport by expressing 60 different constitutive active (and negative) mutants and succeeded in identifying Rab1A, originally described as a Golgi-resident Rab, as a prime candidate. Endogenous Rab1A protein was found to be localized on mature melanosomes in melanocytes, and its functional ablation either by siRNA-mediated knockdown or by overexpression of a cytosolic form of Rab1A-GTPase-activating protein/TBC1D20 induced perinuclear melanosome aggregation. The results of time-lapse imaging further revealed that long-range anterograde melanosome movements were specifically suppressed in Rab1A-deficient melanocytes, whereas retrograde melanosome transport occurred normally. Taken together, these findings indicate that Rab1A is the first crucial component of the anterograde melanosome transport machinery to be identified in mammalian skin melanocytes.

The claims and statistics of this paper haven’t been checked yet.

Run the check — free, no account needed. It reads the open-access text and checks the sources it cites.

A few free checks a day · papers already verified open instantly · results are public

Integrity signals

Registry

Crossref · 10.1242/jcs.109314

Cites

64 of 64 references verified0 citation errors · 0 not checkable

Statistics

Claims the paper makes

The claims and statistics of this paper haven’t been checked yet.

Run the check — free, no account needed. It reads the open-access text and checks the sources it cites.

A few free checks a day · papers already verified open instantly · results are public

Claims other papers make about this one

Each is checked against this paper’s own text: does it say what the citing paper says it does?

  • Rab1 interacts with SKIP and kinesin 1 to regulate melanosome anterograde transport.

    “The Ras-related protein in brain (Rab) 1, which mediates endoplasmic reticulum (ER)-Golgi trafficking, interacts with the SifA and kinesin-interacting protein (SKIP), as well as the anterograde microtubule-dependent motor kinesin 1, to regulate melanosome anterograde transport [ 35 , 36 ]”

    From Melanin's Journey from Melanocytes to Keratinocytes: Uncovering the Molecular Mechanisms of Melanin Transfer and Processing (2023) · cites this paper as [35]

    The Introduction reports that Rab1A regulates ER-to-Golgi trafficking, and the Discussion reports Rab1A binding to SKIP and SKIP binding to kinesin-1. The paper also finds that Rab1A is involved in anterograde melanosome transport, but the Discussion calls transport by a Rab1A–SKIP–kinesin-1 complex a possibility requiring further work, not an established mechanism. No page numbers were available in our copy. (LLM, conf=0.90)

    Experimental — accuracy not yet measured

Self-check

Percentages, sums and reported differences re-computed from the paper’s own numbers.

The self-check needs the paper’s full text.

Cites

Flagged first, then by citations

Cited by

Sorted by citations

Authors
Ishida, M., Ohbayashi, N., Maruta, Y., Ebata, Y., & Fukuda, M.
Affiliations
Tohoku University (JP)
Corresponding author
Fukuda, Mitsunori
Venue
Journal of Cell Science
Published
2012-01-01
Volume
125
Issue
Pt 21
Pages
5177-87
ISSN
  • 0021-9533 (ISSN-L)
  • 1477-9137
OpenAlex
W2061500309
Cited by
49
References
64
Citations by year
2026: 1 · 2025: 2 · 2024: 1 · 2023: 3 · 2022: 2 · 2021: 2 · 2020: 7 · 2019: 4 · 2018: 4 · 2017: 5 · 2016: 4 · 2015: 8 · 2014: 4 · 2013: 2
FWCI
2.12
Type
journal article
Language
en
Open access
Locations
  • Journal of Cell Science (publishedVersion)
  • PubMed (publishedVersion)
Funders
Japan Society for the Promotion of Science (24570206)
Topics
  • Life Sciences › Biochemistry, Genetics and Molecular Biology › Cell Biology › Cellular transport and secretion
  • Life Sciences › Biochemistry, Genetics and Molecular Biology › Cell Biology › melanin and skin pigmentation
  • Life Sciences › Biochemistry, Genetics and Molecular Biology › Physiology › Calcium signaling and nucleotide metabolism
Keywords
Rab1A, melanosome transport, anterograde transport, melanocytes, microtubule transport, retrograde transport, Rab GTPases, membrane trafficking, melanosome aggregation, Golgi apparatus
MeSH terms
Animals, Cell Line, Humans, Melanocytes, Microscopy, Fluorescence, Microtubules, Mutagenesis, Site-Directed, Protein Isoforms, Mutation, Missense, Melanosomes, rab1 GTP-Binding Proteins, Protein Transport, RNA, Small Interfering, Green Fluorescent Proteins, Mice, Gene Knockdown Techniques

About these checks

Registry, retraction, Cites and statistics results are computed, not judged, with one exception: a printed reference that no index lists is read once by a model before it counts as a citation error. Claims are extracted by a model and kept only when their quote appears verbatim in the text; each cited source is then checked, with a model’s help, for whether it says what the claim relies on. Those verdicts can be wrong — read the claim’s quote and the cited source before relying on one.

Statistics and arithmetic are recomputed, not judged.

Confidence bands are shown only for fields calibrated on our annotated test set. None is calibrated yet, so no band is shown.

What counts as a claim ›How we measure confidence ›How we check this ›

Are you an author, or do you see a problem with this page? Request a review