membrane-embedded oxidoreductase / membrane protein / OXIDOREDUCTASE
Function / homology
Function and homology information
copper ion import across plasma membrane / Oxidoreductases; Oxidizing metal ions; With NAD+ or NADP+ as acceptor / ferric-chelate reductase (NADPH) activity / cupric reductase (NADH) activity / iron ion import across plasma membrane / regulated exocytosis / Transferrin endocytosis and recycling / copper ion import / Golgi to plasma membrane transport / trans-Golgi network transport vesicle ...copper ion import across plasma membrane / Oxidoreductases; Oxidizing metal ions; With NAD+ or NADP+ as acceptor / ferric-chelate reductase (NADPH) activity / cupric reductase (NADH) activity / iron ion import across plasma membrane / regulated exocytosis / Transferrin endocytosis and recycling / copper ion import / Golgi to plasma membrane transport / trans-Golgi network transport vesicle / response to hormone / endocytosis / early endosome / endosome membrane / endosome / Golgi membrane / metal ion binding / plasma membrane / cytosol Similarity search - Function
National Institutes of Health/Eunice Kennedy Shriver National Institute of Child Health & Human Development (NIH/NICHD)
United States
Citation
Journal: Elife / Year: 2023 Title: Mechanism of stepwise electron transfer in six-transmembrane epithelial antigen of the prostate (STEAP) 1 and 2. Authors: Kehan Chen / Lie Wang / Jiemin Shen / Ah-Lim Tsai / Ming Zhou / Gang Wu / Abstract: Six transmembrane epithelial antigen of the prostate (STEAP) 1-4 are membrane-embedded hemoproteins that chelate a heme prosthetic group in a transmembrane domain (TMD). STEAP2-4, but not STEAP1, ...Six transmembrane epithelial antigen of the prostate (STEAP) 1-4 are membrane-embedded hemoproteins that chelate a heme prosthetic group in a transmembrane domain (TMD). STEAP2-4, but not STEAP1, have an intracellular oxidoreductase domain (OxRD) and can mediate cross-membrane electron transfer from NADPH via FAD and heme. However, it is unknown whether STEAP1 can establish a physiologically relevant electron transfer chain. Here, we show that STEAP1 can be reduced by reduced FAD or soluble cytochrome reductase that serves as a surrogate OxRD, providing the first evidence that STEAP1 can support a cross-membrane electron transfer chain. It is not clear whether FAD, which relays electrons from NADPH in OxRD to heme in TMD, remains constantly bound to the STEAPs. We found that FAD reduced by STEAP2 can be utilized by STEAP1, suggesting that FAD is diffusible rather than staying bound to STEAP2. We determined the structure of human STEAP2 in complex with NADP and FAD to an overall resolution of 3.2 Å by cryo-electron microscopy and found that the two cofactors bind STEAP2 similarly as in STEAP4, suggesting that a diffusible FAD is a general feature of the electron transfer mechanism in the STEAPs. We also demonstrated that STEAP2 reduces ferric nitrilotriacetic acid (Fe-NTA) significantly slower than STEAP1 and proposed that the slower reduction is due to the poor Fe-NTA binding to the highly flexible extracellular region in STEAP2. These results establish a solid foundation for understanding the function and mechanisms of the STEAPs.
Name: Metalloreductase STEAP2 / type: protein_or_peptide / ID: 1 / Number of copies: 3 / Enantiomer: LEVO EC number: Oxidoreductases; Oxidizing metal ions; With NAD+ or NADP+ as acceptor
In the structure databanks used in Yorodumi, some data are registered as the other names, "COVID-19 virus" and "2019-nCoV". Here are the details of the virus and the list of structure data.
Jan 31, 2019. EMDB accession codes are about to change! (news from PDBe EMDB page)
EMDB accession codes are about to change! (news from PDBe EMDB page)
The allocation of 4 digits for EMDB accession codes will soon come to an end. Whilst these codes will remain in use, new EMDB accession codes will include an additional digit and will expand incrementally as the available range of codes is exhausted. The current 4-digit format prefixed with “EMD-” (i.e. EMD-XXXX) will advance to a 5-digit format (i.e. EMD-XXXXX), and so on. It is currently estimated that the 4-digit codes will be depleted around Spring 2019, at which point the 5-digit format will come into force.
The EM Navigator/Yorodumi systems omit the EMD- prefix.
Related info.:Q: What is EMD? / ID/Accession-code notation in Yorodumi/EM Navigator
Yorodumi is a browser for structure data from EMDB, PDB, SASBDB, etc.
This page is also the successor to EM Navigator detail page, and also detail information page/front-end page for Omokage search.
The word "yorodu" (or yorozu) is an old Japanese word meaning "ten thousand". "mi" (miru) is to see.
Related info.:EMDB / PDB / SASBDB / Comparison of 3 databanks / Yorodumi Search / Aug 31, 2016. New EM Navigator & Yorodumi / Yorodumi Papers / Jmol/JSmol / Function and homology information / Changes in new EM Navigator and Yorodumi