PaperBLAST – Find papers about a protein or its homologs

 

PaperBLAST

PaperBLAST Hits for sp|Q9I037|QUEF_PSEAE NADPH-dependent 7-cyano-7-deazaguanine reductase OS=Pseudomonas aeruginosa (strain ATCC 15692 / DSM 22644 / CIP 104116 / JCM 14847 / LMG 12228 / 1C / PRS 101 / PAO1) OX=208964 GN=queF PE=3 SV=1 (276 a.a., MQHPAEHSPL...)

Other sequence analysis tools:

Find functional residues: SitesBLAST

Search for conserved domains

Find the best match in UniProt

Compare to protein structures

Predict transmenbrane helices: Phobius

Predict protein localization: PSORTb

Find homologs in fast.genomics

Fitness BLAST: loading...

Found 43 similar proteins in the literature:

PA2806 hypothetical protein from Pseudomonas aeruginosa PAO1
100% identity, 100% coverage

WP_208691271 NADPH-dependent 7-cyano-7-deazaguanine reductase QueF from Pseudomonas oryzihabitans
68% identity, 99% coverage

BPP1768 conserved hypothetical protein from Bordetella parapertussis 12822
60% identity, 95% coverage

BB3340 7-cyano-7-deazaguanine reductase from Bordetella bronchiseptica RB50
60% identity, 95% coverage

BP2084 conserved hypothetical protein from Bordetella pertussis Tohama I
59% identity, 95% coverage

QUEF_VIBCH / Q9KTK0 NADPH-dependent 7-cyano-7-deazaguanine reductase; 7-cyano-7-carbaguanine reductase; NADPH-dependent nitrile oxidoreductase; PreQ(0) reductase; EC 1.7.1.13 from Vibrio cholerae serotype O1 (strain ATCC 39315 / El Tor Inaba N16961) (see paper)
Q9KTK0 preQ1 synthase (EC 1.7.1.13) from Vibrio cholerae (see paper)
55% identity, 95% coverage

YqcD / b2794 7-cyano-7-deazaguanine reductase (EC 1.7.1.13) from Escherichia coli K-12 substr. MG1655 (see paper)
queF / Q46920 7-cyano-7-deazaguanine reductase (EC 1.7.1.13) from Escherichia coli (strain K12) (see 4 papers)
QUEF_ECOLI / Q46920 NADPH-dependent 7-cyano-7-deazaguanine reductase; 7-cyano-7-carbaguanine reductase; NADPH-dependent nitrile oxidoreductase; PreQ(0) reductase; EC 1.7.1.13 from Escherichia coli (strain K12) (see 3 papers)
Q46920 preQ1 synthase (EC 1.7.1.13) from Escherichia coli (see 2 papers)
WP_000100421 NADPH-dependent 7-cyano-7-deazaguanine reductase QueF from Escherichia coli
NP_417274 7-cyano-7-deazaguanine reductase from Escherichia coli str. K-12 substr. MG1655
NP_417274, b2794 hypothetical protein from Escherichia coli str. K-12 substr. MG1655
53% identity, 95% coverage

c3360 Hypothetical protein yqcD from Escherichia coli CFT073
53% identity, 95% coverage

Z4111 orf, hypothetical protein from Escherichia coli O157:H7 EDL933
52% identity, 95% coverage

t2876 conserved hypothetical protein from Salmonella enterica subsp. enterica serovar Typhi Ty2
52% identity, 95% coverage

3s19A / Q9KTK0 Crystal structure of the r262l mutant of 7-cyano-7-deazaguanine reductase, quef from vibrio cholerae complexed with preq0
54% identity, 95% coverage

swp_3543 GTP cyclohydrolase I from Shewanella piezotolerans WP3
52% identity, 93% coverage

SO_1608 conserved hypothetical protein from Shewanella oneidensis MR-1
51% identity, 90% coverage

HD1665 possible GTP cyclohydrolase I from Haemophilus ducreyi 35000HP
48% identity, 96% coverage

VP_RS03365 NADPH-dependent 7-cyano-7-deazaguanine reductase QueF from Vibrio parahaemolyticus RIMD 2210633
52% identity, 95% coverage

BMSBPS_0622 NADPH-dependent 7-cyano-7-deazaguanine reductase QueF from Candidatus Pantoea carbekii
48% identity, 95% coverage

wcw_0365 NADPH-dependent 7-cyano-7-deazaguanine reductase QueF from Waddlia chondrophila WSU 86-1044
47% identity, 99% coverage

A1S_2313 7-cyano-7-deazaguanine reductase from Acinetobacter baumannii ATCC 17978
49% identity, 92% coverage

P44165 Uncharacterized protein HI_1340 from Haemophilus influenzae (strain ATCC 51907 / DSM 11121 / KW20 / Rd)
HI1340 conserved hypothetical protein from Haemophilus influenzae Rd KW20
39% identity, 59% coverage

jhp1308 putative from Helicobacter pylori J99
43% identity, 31% coverage

HP1413 conserved hypothetical protein from Helicobacter pylori 26695
37% identity, 41% coverage

NGO1684 hypothetical protein from Neisseria gonorrhoeae FA 1090
NGFG_02134 preQ(1) synthase from Neisseria gonorrhoeae MS11
37% identity, 35% coverage

SERP0394 hypothetical protein from Staphylococcus epidermidis RP62A
SE0510 conserved hypothetical protein from Staphylococcus epidermidis ATCC 12228
36% identity, 47% coverage

NMB0317 hypothetical protein from Neisseria meningitidis MC58
37% identity, 35% coverage

QUEF_GEOKA / Q5L1B7 NADPH-dependent 7-cyano-7-deazaguanine reductase; 7-cyano-7-carbaguanine reductase; NADPH-dependent nitrile oxidoreductase; Nitrile reductase; NRed; PreQ(0) reductase; EC 1.7.1.13 from Geobacillus kaustophilus (strain HTA426)
43% identity, 28% coverage

DNO_0818 7-cyano-7-deazaguanine reductase from Dichelobacter nodosus VCS1703A
39% identity, 37% coverage

SAUSA300_0713 GTP cyclohydrolase I from Staphylococcus aureus subsp. aureus USA300_FPR3757
40% identity, 31% coverage

BMMGA3_03100 preQ(1) synthase from Bacillus methanolicus MGA3
41% identity, 31% coverage

STER_RS04310 preQ(1) synthase from Streptococcus thermophilus LMD-9
41% identity, 31% coverage

QUEF_BACSU / O31678 NADPH-dependent 7-cyano-7-deazaguanine reductase; 7-cyano-7-carbaguanine reductase; NADPH-dependent nitrile oxidoreductase; PreQ(0) reductase; EC 1.7.1.13 from Bacillus subtilis (strain 168) (see 3 papers)
O31678 preQ1 synthase (EC 1.7.1.13) from Bacillus subtilis (see 2 papers)
NP_389258 NADPH-dependent 7-cyano-7-deazaguanine reductase from Bacillus subtilis subsp. subtilis str. 168
BSU13750 7-cyano-7-deazaguanine reductase from Bacillus subtilis subsp. subtilis str. 168
40% identity, 31% coverage

4f8bB / O31678 Crystal structure of the covalent thioimide intermediate of unimodular nitrile reductase quef (see paper)
40% identity, 31% coverage

Bd0087 GTP cyclohydrolase I from Bdellovibrio bacteriovorus HD100
36% identity, 38% coverage

PG1347 conserved hypothetical protein from Porphyromonas gingivalis W83
42% identity, 29% coverage

WP_071153391 preQ(1) synthase from Planococcus faecalis
40% identity, 31% coverage

SPD_1568 GTP cyclohydrolase, putative from Streptococcus pneumoniae D39
38% identity, 33% coverage

SPCG_RS09080 preQ(1) synthase from Streptococcus pneumoniae CGSP14
35% identity, 38% coverage

SP_1777 7-cyano-7-deazaguanine reductase from Streptococcus pneumoniae TIGR4
38% identity, 33% coverage

Q9A515 NADPH-dependent 7-cyano-7-deazaguanine reductase from Caulobacter vibrioides (strain ATCC 19089 / CIP 103742 / CB 15)
40% identity, 29% coverage

Atu2273 7-cyano-7-deazaguanine reductase from Agrobacterium tumefaciens str. C58 (Cereon)
35% identity, 42% coverage

SMc02723 CONSERVED HYPOTHETICAL PROTEIN from Sinorhizobium meliloti 1021
Q92N45 NADPH-dependent 7-cyano-7-deazaguanine reductase from Rhizobium meliloti (strain 1021)
41% identity, 29% coverage

BAB1_1206 GTP cyclohydrolase I from Brucella melitensis biovar Abortus 2308
39% identity, 35% coverage

ZMO0326 7-cyano-7-deazaguanine reductase from Zymomonas mobilis subsp. mobilis ZM4
41% identity, 29% coverage

Q8F4F6 NADPH-dependent 7-cyano-7-deazaguanine reductase from Leptospira interrogans serogroup Icterohaemorrhagiae serovar Lai (strain 56601)
Q72RB6 NADPH-dependent 7-cyano-7-deazaguanine reductase from Leptospira interrogans serogroup Icterohaemorrhagiae serovar copenhageni (strain Fiocruz L1-130)
35% identity, 26% coverage

New Search

For advice on how to use these tools together, see Interactive tools for functional annotation of bacterial genomes.

Statistics

The PaperBLAST database links 793,807 different protein sequences to 1,259,118 scientific articles. Searches against EuropePMC were last performed on March 13 2025.

How It Works

PaperBLAST builds a database of protein sequences that are linked to scientific articles. These links come from automated text searches against the articles in EuropePMC and from manually-curated information from GeneRIF, UniProtKB/Swiss-Prot, BRENDA, CAZy (as made available by dbCAN), BioLiP, CharProtDB, MetaCyc, EcoCyc, TCDB, REBASE, the Fitness Browser, and a subset of the European Nucleotide Archive with the /experiment tag. Given this database and a protein sequence query, PaperBLAST uses protein-protein BLAST to find similar sequences with E < 0.001.

To build the database, we query EuropePMC with locus tags, with RefSeq protein identifiers, and with UniProt accessions. We obtain the locus tags from RefSeq or from MicrobesOnline. We use queries of the form "locus_tag AND genus_name" to try to ensure that the paper is actually discussing that gene. Because EuropePMC indexes most recent biomedical papers, even if they are not open access, some of the links may be to papers that you cannot read or that our computers cannot read. We query each of these identifiers that appears in the open access part of EuropePMC, as well as every locus tag that appears in the 500 most-referenced genomes, so that a gene may appear in the PaperBLAST results even though none of the papers that mention it are open access. We also incorporate text-mined links from EuropePMC that link open access articles to UniProt or RefSeq identifiers. (This yields some additional links because EuropePMC uses different heuristics for their text mining than we do.)

For every article that mentions a locus tag, a RefSeq protein identifier, or a UniProt accession, we try to select one or two snippets of text that refer to the protein. If we cannot get access to the full text, we try to select a snippet from the abstract, but unfortunately, unique identifiers such as locus tags are rarely provided in abstracts.

PaperBLAST also incorporates manually-curated protein functions:

Except for GeneRIF and ENA, the curated entries include a short curated description of the protein's function. For entries from BioLiP, the protein's function may not be known beyond binding to the ligand. Many of these entries also link to articles in PubMed.

For more information see the PaperBLAST paper (mSystems 2017) or the code. You can download PaperBLAST's database here.

Changes to PaperBLAST since the paper was written:

Many of these changes are described in Interactive tools for functional annotation of bacterial genomes.

Secrets

PaperBLAST cannot provide snippets for many of the papers that are published in non-open-access journals. This limitation applies even if the paper is marked as "free" on the publisher's web site and is available in PubmedCentral or EuropePMC. If a journal that you publish in is marked as "secret," please consider publishing elsewhere.

Omissions from the PaperBLAST Database

Many important articles are missing from PaperBLAST, either because the article's full text is not in EuropePMC (as for many older articles), or because the paper does not mention a protein identifier such as a locus tag, or because of PaperBLAST's heuristics. If you notice an article that characterizes a protein's function but is missing from PaperBLAST, please notify the curators at UniProt or add an entry to GeneRIF. Entries in either of these databases will eventually be incorporated into PaperBLAST. Note that to add an entry to UniProt, you will need to find the UniProt identifier for the protein. If the protein is not already in UniProt, you can ask them to create an entry. To add an entry to GeneRIF, you will need an NCBI Gene identifier, but unfortunately many prokaryotic proteins in RefSeq do not have corresponding Gene identifers.

References

PaperBLAST: Text-mining papers for information about homologs.
M. N. Price and A. P. Arkin (2017). mSystems, 10.1128/mSystems.00039-17.

Europe PMC in 2017.
M. Levchenko et al (2017). Nucleic Acids Research, 10.1093/nar/gkx1005.

Gene indexing: characterization and analysis of NLM's GeneRIFs.
J. A. Mitchell et al (2003). AMIA Annu Symp Proc 2003:460-464.

UniProt: the universal protein knowledgebase.
The UniProt Consortium (2016). Nucleic Acids Research, 10.1093/nar/gkw1099.

BRENDA in 2017: new perspectives and new tools in BRENDA.
S. Placzek et al (2017). Nucleic Acids Research, 10.1093/nar/gkw952.

The EcoCyc database: reflecting new knowledge about Escherichia coli K-12.
I. M. Keeseler et al (2016). Nucleic Acids Research, 10.1093/nar/gkw1003.

The MetaCyc database of metabolic pathways and enzymes.
R. Caspi et al (2018). Nucleic Acids Research, 10.1093/nar/gkx935.

CharProtDB: a database of experimentally characterized protein annotations.
R. Madupu et al (2012). Nucleic Acids Research, 10.1093/nar/gkr1133.

The carbohydrate-active enzymes database (CAZy) in 2013.
V. Lombard et al (2014). Nucleic Acids Research, 10.1093/nar/gkt1178.

The Transporter Classification Database (TCDB): recent advances
M. H. Saier, Jr. et al (2016). Nucleic Acids Research, 10.1093/nar/gkv1103.

REBASE - a database for DNA restriction and modification: enzymes, genes and genomes.
R. J. Roberts et al (2015). Nucleic Acids Research, 10.1093/nar/gku1046.

Deep annotation of protein function across diverse bacteria from mutant phenotypes.
M. N. Price et al (2016). bioRxiv, 10.1101/072470.

by Morgan Price, Arkin group
Lawrence Berkeley National Laboratory