PaperBLAST – Find papers about a protein or its homologs

 

PaperBLAST

PaperBLAST Hits for TCDB::Q9HZ58 Probable L-glutamate/N-acetylglutamate uptake porter, GltS.  Involved in N-acetylglutamate catabolism as a carbon and nitrogen source (Pseudomonas aeruginosa (strain ATCC 15692 / PAO1 / 1C / PRS 101 / LMG 12228)) (404 a.a., MPTLHLDALS...)

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:

TC 2.A.27.1.3 / Q9HZ58 Probable L-glutamate/N-acetylglutamate uptake porter, GltS.  Involved in N-acetylglutamate catabolism as a carbon and nitrogen source from Pseudomonas aeruginosa (strain ATCC 15692 / PAO1 / 1C / PRS 101 / LMG 12228)
PA3176 sodium/glutamate symporter GltS from Pseudomonas aeruginosa PAO1
100% identity, 100% coverage

PA14_23160 sodium/glutamate symporter from Pseudomonas aeruginosa UCBPP-PA14
99% identity, 100% coverage

DV527_RS02905 sodium/glutamate symporter from Staphylococcus saprophyticus
45% identity, 99% coverage

SERP1935 sodium:glutamate symporter from Staphylococcus epidermidis RP62A
40% identity, 99% coverage

FN1801 Sodium/glutamate symport carrier protein from Fusobacterium nucleatum subsp. nucleatum ATCC 25586
40% identity, 97% coverage

SA2135 hypothetical protein from Staphylococcus aureus subsp. aureus N315
41% identity, 99% coverage

SACOL2340 sodium:glutamate symporter from Staphylococcus aureus subsp. aureus COL
SAOUHSC_02622 sodium/glutamate symporter from Staphylococcus aureus subsp. aureus NCTC 8325
SAUSA300_2291 sodium/glutamate symporter from Staphylococcus aureus subsp. aureus USA300_FPR3757
NWMN_2246 sodium/glutamate symporter from Staphylococcus aureus subsp. aureus str. Newman
41% identity, 99% coverage

ZP_02423775 hypothetical protein from Eubacterium siraeum DSM 15702
41% identity, 99% coverage

PFJ30894_RS00375 sodium/glutamate symporter from Phascolarctobacterium faecium
40% identity, 99% coverage

HRAG_00091 sodium/glutamate symporter from Helicobacter bilis ATCC 43879
40% identity, 93% coverage

CD1746 sodium/glutamate symporter from Clostridium difficile 630
35% identity, 96% coverage

YPO0035 sodium/glutamate symport carrier protein from Yersinia pestis CO92
41% identity, 96% coverage

FN0793 Sodium/glutamate symport carrier protein from Fusobacterium nucleatum subsp. nucleatum ATCC 25586
C4N14_08255 sodium/glutamate symporter from Fusobacterium nucleatum subsp. nucleatum ATCC 23726
36% identity, 100% coverage

PMI2867 sodium/glutamate symport carrier protein from Proteus mirabilis HI4320
42% identity, 96% coverage

NMC0069 sodium/glutamate symport carrier protein from Neisseria meningitidis FAM18
37% identity, 99% coverage

NMB0085 sodium/glutamate symporter from Neisseria meningitidis MC58
37% identity, 99% coverage

FPV33_RS00465 sodium/glutamate symporter from Klebsiella aerogenes
41% identity, 96% coverage

HI1530 glutamate permease (gltS) from Haemophilus influenzae Rd KW20
39% identity, 92% coverage

APL_0967 sodium/glutamate symport carrier protein from Actinobacillus pleuropneumoniae L20
36% identity, 99% coverage

gltS / O26036 glutamate:Na+ symporter GltS from Helicobacter pylori (strain ATCC 700392 / 26695) (see 2 papers)
HP1506 glutamate permease (gltS) from Helicobacter pylori 26695
35% identity, 98% coverage

GltC / b3653 glutamate:sodium symporter from Escherichia coli K-12 substr. MG1655
gltS / P0AER8 glutamate:sodium symporter from Escherichia coli (strain K12) (see 7 papers)
GLTS_ECOLI / P0AER8 Sodium/glutamate symporter; Glutamate permease from Escherichia coli (strain K12) (see 6 papers)
TC 2.A.27.1.1 / P0AER8 Glutamate:Na+ symporter (transports L- and D-glutamate, α-methylglutamate and homocysteate). Swapping the order of the two halves (repeat units) does not decrease activity from Escherichia coli (see 7 papers)
NP_418110 glutamate:sodium symporter from Escherichia coli str. K-12 substr. MG1655
b3653 glutamate transporter from Escherichia coli str. K-12 substr. MG1655
40% identity, 96% coverage

PP0996 sodium-glutamate symporter from Pseudomonas putida KT2440
42% identity, 92% coverage

HBZC1_14360 sodium/glutamate symporter from Helicobacter bizzozeronii CIII-1
37% identity, 95% coverage

NGFG_01803 sodium/glutamate symporter from Neisseria gonorrhoeae MS11
38% identity, 93% coverage

NGO1890 GltS from Neisseria gonorrhoeae FA 1090
38% identity, 93% coverage

TC 2.A.27.1.2 / P73275 Glutamate:Na+ symporter (see paper)
slr1145 glutamate permease from Synechocystis sp. PCC 6803
35% identity, 99% coverage

VPA0035 sodium/glutamate symporter from Vibrio parahaemolyticus RIMD 2210633
36% identity, 93% coverage

ABO_1616 sodium/glutamate symport carrier protein from Alcanivorax borkumensis SK2
38% identity, 99% coverage

t3773 glutamate permease from Salmonella enterica subsp. enterica serovar Typhi Ty2
41% identity, 96% coverage

STM3746 GltS family, glutamate transport protein from Salmonella typhimurium LT2
41% identity, 96% coverage

YP_001675245 sodium/glutamate symporter from Shewanella halifaxensis HAW-EB4
35% identity, 96% coverage

YP_001675528 sodium/glutamate symporter from Shewanella halifaxensis HAW-EB4
36% identity, 96% coverage

PBPRA2089 Putative sodium/glutamate symporter from Photobacterium profundum SS9
35% identity, 95% coverage

DMO12_07344, HTZ92_1001 sodium/glutamate symporter from Acinetobacter baumannii ATCC 19606 = CIP 70.34 = JCM 6841
38% identity, 92% coverage

SO2923 sodium/glutamate symporter from Shewanella oneidensis MR-1
36% identity, 96% coverage

F898_02609 sodium/glutamate symporter from Acinetobacter courvalinii
37% identity, 99% coverage

CV1105 sodium/glutamate symport carrier protein from Chromobacterium violaceum ATCC 12472
39% identity, 96% coverage

VPA0031 sodium/glutamate symporter from Vibrio parahaemolyticus RIMD 2210633
34% identity, 96% coverage

VIBR0546_06697 sodium/glutamate symporter from Vibrio brasiliensis LMG 20546
35% identity, 93% coverage

YP_001476116 sodium/glutamate symporter from Shewanella sediminis HAW-EB3
35% identity, 94% coverage

SYNW0882 Sodium/glutamate symporter from Synechococcus sp. WH 8102
35% identity, 97% coverage

BP0402 putative sodium/glutamate symport carrier protein from Bordetella pertussis Tohama I
Q7VSK9 Sodium/glutamate symporter from Bordetella pertussis (strain Tohama I / ATCC BAA-589 / NCTC 13251)
33% identity, 95% coverage

SAMN05444581_1147 sodium/glutamate symporter from Methylocapsa palsarum
35% identity, 88% 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