Evidence map›Paper›PMID 12162790›Full record

ArticleThe Biochemical journal2002

The heavy chain of neonatal Fc receptor for IgG is sequestered in endoplasmic reticulum by forming oligomers in the absence of beta2-microglobulin association.

Xiaoping Zhu, Junmin Peng, Raktima Raychowdhury, Atsushi Nakajima, Wayne I Lencer, Richard S Blumberg

Open access · greenAbstract read
In one paragraph

Article in The Biochemical journal, 2002. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 20 papers.

0numbers the graph read from it
0cells of the map it votes in
20citing papers in PubMed
0.8field-weighted citation impact, top 25% of its field
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

20 citing papers in PubMed, 47 citations in OpenAlex.

  1. Article
  2. The therapeutic age of the neonatal Fc receptor.Nature reviews. Immunology · 2023
    Review
  3. Review
  4. Article
  5. Article
  6. Article
  7. Review
  8. Review
  9. Review
  10. Neonatal Fc receptor: from immunity to therapeutics.Journal of clinical immunology · 2010
    Review
  11. Article
  12. Review
  13. Review
  14. Article
  15. Article
  16. Article
  17. Article
  18. Article
  19. Article
  20. Article
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

6 authors at 1 institution in 1 country.

Xiaoping ZhuGastroenterology Division, Brigham and Women's Hospital, Harvard Medical School, Boston, MA 02115, USA.
Junmin Peng
Raktima Raychowdhury
Atsushi Nakajima
Wayne I Lencer
Richard S Blumberg
Harvard University · US

Funding

STRUCTURE-FUNCTION RELATIONSHIPS IN THE ALIMENTARY TRACTP30DK034854 · NIDDK · HARVARD UNIVERSITY (MEDICAL SCHOOL) · PI JONATHAN C KAGAN · 1986 to 2026
$32.4M
Regulation of Mucosal LymphocytesR01DK051362 · NIDDK · BRIGHAM AND WOMEN'S HOSPITAL · PI Richard S Blumberg, Yu-Hwa Huang Blumberg · 1997 to 2026
$13.5M
INTESTINAL TRANSCYTOSIS OF IGG IN ADULT LIFER01DK053056 · NIDDK · BRIGHAM AND WOMEN'S HOSPITAL · PI BLUMBERG, RICHARD S · 1997 to 2021
$10.6M
MOLECULAR CHARACTERIZATION OF MUCOSAL LYMPHOCYTESR01DK044319 · NIDDK · BRIGHAM AND WOMEN'S HOSPITAL · PI Richard S Blumberg · 1992 to 2026
$10.4M
Characterization of Mucosal LymphocytesR37DK044319 · NIDDK · BRIGHAM AND WOMEN'S HOSPITAL · PI BLUMBERG, RICHARD S · 2005 to 2014
$7.2M
NIDDK NIH HHS DK34854NIDDK NIH HHS DK44319NIDDK NIH HHS DK51362NIDDK NIH HHS DK/AI53056
6 · The paper itself

Abstract

The heavy chain (HC) of the neonatal Fc receptor (FcRn) for IgG is non-convalently associated with beta(2)-microglobulin (beta(2)m). In beta(2)m(-/-) mice, FcRn functions are greatly impaired. We sought to determine how FcRn HC, particularly its structure and biogenesis, is affected by the absence of beta(2)m. Human FcRn HC, expressed from the beta(2)m-null cell line FO-1(FcRn), was present as a monomeric 45-kDa protein under reducing conditions but primarily as a 92-kDa oligomeric protein under non-reducing conditions. Two-dimensional electrophoresis and MS analysis showed that the 92-kDa protein was a dimer of the 45-kDa HC. Immunostaining showed that FcRn HC in FO-1(FcRn) was co-localized with the endoplasmic reticulum (ER) protein Bip/GRP78 but not with an endosome protein, EEA1. In contrast, FcRn HC in FO-1(FcRn+beta2m) was detected in both the ER and endosome. The dimeric HC in FcRn oligomers was free of beta(2)m association in FO-1(FcRn+beta2m). Mutation of non-paired cysteine residues at positions 48 and 251 within the human FcRn cDNA failed to eliminate the oligomers. The FcRn HC oligomers could be reduced by reconstitution of FO-1(FcRn) with beta(2)m or by balanced expression of FcRn HC with beta(2)m, or beta(2)m fused with a KDEL retention sequence. Similarly, the majority of FcRn HC isolated from neonatal beta(2)m(-/-) mice was in a dimeric form under non-reducing conditions. The amount of FcRn HC was significantly decreased in beta(2)m(-/-) mice and FO-1(FcRn). Furthermore, beta(2)m-free FcRn HC was sensitive to endoglycosidase digestion. These results indicate that FcRn HC alone can form disulphide-bonded oligomers in the ER, which may represent a misfolded protein. The beta(2)m association with FcRn HC is critical for correct folding of FcRn and exiting the ER for routing to endosomes and the cell surface.

Indexed as

AnimalsBase Sequencebeta 2-MicroglobulinCysteineDimerizationDNA PrimersEndoplasmic ReticulumEndoplasmic Reticulum Chaperone BiPHumansImmunoglobulin GMiceMice, Inbred C57BLMutagenesis, Site-DirectedReceptors, Fcbeta 2-MicroglobulinCysteineDNA PrimersEndoplasmic Reticulum Chaperone BiPHSPA5 protein, humanHspa5 protein, mouseImmunoglobulin GReceptors, Fc

Identifiers

PMID12162790
PMCPMC1222943
OpenAlexW2060289619

What OpenQuestion holds

Textmetadata
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 OpenQuestion graph.