Rv1789 (PPE26)

Current annotations:
- TBCAP: (community-based annotations - see table at bottom of page)
- TBDB: PPE family protein
- REFSEQ: PPE family protein
- PATRIC: PPE family protein
- TUBERCULIST: PPE family protein PPE26
- NCBI: PPE family protein PPE26
- updated information (H37Rv4):
  - gene name: PPE26
  - function:
  - reference:
Type: Not Target
Start: 2026790
End: 2027971
Operon:

Trans-membrane region:
Role: IV.C.2 - PPE family
GO terms:
- GO:0009405 - pathogenesis (Uniprot)
Reaction(s) (based on iSM810 metabolic model):
Gene Expression Profile (Transcriptional Responses to Drugs; Boshoff et al, 2004)
Gene Modules extracted from cluster analysis of 249 transcriptomic datasets using ICA
Orthologs among selected mycobacteria
Protein structure:
Search for Homologs in PDB

Top 10 Homologs in PDB (as of Nov 2020):

PDB	aa ident	species	PDB title
5XFS	58%	Mycobacterium tuberculosis (strain ATCC 25618 / H37Rv)	Crystal structure of PE8-PPE15 in complex with EspG5 from M. tuberculosis
6VHR	40%	Mycobacterium tuberculosis (strain ATCC 25618 / H37Rv)	Structure of PE5-PPE4-EspG3 complex from the type VII (ESX-3) secretion system, space group I422
6UUJ	40%	Mycobacterium tuberculosis (strain ATCC 25618 / H37Rv)	Structure of PE5-PPE4-EspG3 complex from the type VII (ESX-3) secretion system, space group P212121
4W4L	36%	Mycobacterium tuberculosis	Crystal structure of EspG5 in complex with PE25 and PPE41 from the ESX-5 type VII secretion system of M. tuberculosis
4W4K	36%	Mycobacterium tuberculosis	Crystal structure of a PE25-PPE41 heterodimer from a type VII secretion system of M. tuberculosis
4KXR	35%	Mycobacterium tuberculosis	Structure of the Mycobacterium tuberculosis type VII secretion system chaperone EspG5 in complex with PE25-PPE41 dimer
2G38	35%	Mycobacterium tuberculosis	A PE/PPE Protein Complex from Mycobacterium tuberculosis

Links to additional information on PPE26:
- TBDB (updated)
- Phyre2 structure prediction, model: final.casp.pdb (from Mao et al, 2013)
- UniProt
- AlphaFold model
- Vulnerability = 0.046 (from Jeremy Rock's lab)
- KEGG - nucleotide and amino acid sequences of gene
- Mycobrowser
- PATRIC
- BioCyc
- Systems Biology

Amino Acid Sequence

MDFGALPPEVNSVRMYAGPGSAPMVAAASAWNGLAAELSSAATGYETVITQLSSEGWLGPASAAMAEAVAPYVAWMSAAAAQAEQAATQARAAAAAFEAA
FAATVPPPLIAANRASLMQLISTNVFGQNTSAIAAAEAQYGEMWAQDSAAMYAYAGSSASASAVTPFSTPPQIANPTAQGTQAAAVATAAGTAQSTLTEM
ITGLPNALQSLTSPLLQSSNGPLSWLWQILFGTPNFPTSISALLTDLQPYASFFYNTEGLPYFSIGMGNNFIQSAKTLGLIGSAAPAAVAAAGDAAKGLP
GLGGMLGGGPVAAGLGNAASVGKLSVPPVWSGPLPGSVTPGAAPLPVSTVSAAPEAAPGSLLGGLPLAGAGGAGAGPRYGFRPTVMARPPFAG

(Nucleotide sequence available on KEGG)

Additional Information

ESSENTIALITY

MtbTnDB - interactive tool for exploring a database of published TnSeq datasets for Mtb

TnSeqCorr - genes with correlated TnSeq profiles across >100 conditions *new*

Classification	Condition	Strain	Method	Reference	Notes
Non-Essential	Sodium Oleate	H37RvMA	Gumbel	Subhalaxmi Nambi	Probability of Essentiality: 0.000000; 2 non-insertions in a row out of 20 sites
Non-Essential	Lignoceric Acid	H37RvMA	Gumbel	Subhalaxmi Nambi	Probability of Essentiality: 0.000000; 2 non-insertions in a row out of 20 sites
Non-Essential	Phosphatidylcholine	H37RvMA	Gumbel	Subhalaxmi Nambi	Probability of Essentiality: 0.000000; 1 non-insertions in a row out of 20 sites
Non-Essential	minimal media + 0.1% glycerol	H37RvMA	Gumbel	Griffin et al. (2011)	Probability of Essentiality: 0.000000; 2 non-insertions in a row out of 21 sites
Non-Essential	minimal media + 0.01% cholesterol	H37RvMA	Gumbel	Griffin et al. (2011)	Probability of Essentiality: 0.000000; 2 non-insertions in a row out of 21 sites
No-Data	7H10-glycerol	H37RvMA	TraSH	Sassetti et al. (2003a)
Too-Short	C57BL/6J mice (8 weeks)	H37RvMA	TraSH	Sassetti et al. (2003b)	Hybridization Ratio: -1
Growth-Advantage	7H09/7H10 + rich media	H37RvMA	MotifHMM	DeJesus et al. (2017)	Fully saturated (14 reps).

TnSeq Data No data currently available.

No TnSeq data currently available for this Target.

RNASeq Data No data currently available.

No RNA-Seq data currently available for this Target.

Metabolomic Profiles No data currently available.

No Metabolomic data currently available for this Target.

Proteomic Data No data currently available.

No Proteomic data currently available for this Target.

Regulatory Relationships from Systems Biology

BioCyc

Gene interactions based on ChIPSeq and Transcription Factor Over-Expression (TFOE) (Systems Biology)

NOTE: Green edges represent the connected genes being classified as differentially essential as a result of the middle gene being knocked out. These interactions are inferred based on RNASeq.

Interactions based on ChIPSeq data

RNA processing and modification

Energy production and conversion

Chromatin structure and dynamics

Amino acid transport and metabolism

Cell cycle control, cell division, chromosome partitioning

Carbohydrate transport and metabolism

Nucleotide transport and metabolism

Lipid transport and metabolism

Coenzyme transport and metabolism

Transcription

Translation, ribosomal structure and biogenesis

Cell wall/membrane/envelope biogenesis

Replication, recombination and repair

Posttranslational modification, protein turnover, chaperones

Cell motility

Secondary metabolites biosynthesis, transport and catabolism

Inorganic ion transport and metabolism

Function unknown

General function prediction only

Intracellular trafficking, secretion, and vesicular transport

Signal transduction mechanisms

Extracellular structures

Defense mechanisms

Nuclear structure

Cytoskeleton

BioCyc Co-regulated genes based on gene expression profiling (Systems Biology, Inferelator Network)

Differentially expressed as result of RNASeq in glycerol environment (Only top 20 genes shown sorted by log fold change with p_adj 0.05).

Conditionally essential as result of TNSeq (Only top 20 genes shown sorted by log fold change with p_adj 0.05).

BioCyc Transcription factor binding based on ChIP-Seq (Systems Biology)

Binds To:
- No bindings to other targets were found.
Bound By:
- No bindings from other targets were found.

Interactions based on ChIPSeq data (Minch et al. 2014)

Binds To:
- No bindings to other targets were found.
Bound By:
- Rv0678 (-) (Upstream of operon)
- Rv3830c (-) (Upstream of operon)

Interactions based on TFOE data (Rustad et al. 2014)

Upregulates:
- Does not upregulate other genes.
Upregulated by:
- Not upregulated by other genes.
Downregulates:
- Does not downregulate other genes.
Downregulated by:
- Not downregulated by other genes.

Property	Value	Creator	Evidence	PMID	Comment
Citation	Clusters of PE and PPE genes of Mycobacterium tuberculosis are organized in operons: evidence that PE Rv2431c is co-transcribed with PPE Rv2430c and their gene products interact with each other. S. Tundup, Y. Akhter et al. FEBS Lett. 2006	gaat3s	NAS	16458305	Operon (Functional linkage)
Interaction	PhysicalInteraction Rv1788	gaat3s	NAS		Operon (Functional linkage) S. Tundup, Y. Akhter et al. Clusters of PE and PPE genes of Mycobacterium tuberculosis are organized in operons: evidence that PE Rv2431c is co-transcribed with PPE Rv2430c and their gene products interact with each other. FEBS Lett. 2006
Citation	Identifying cognate binding pairs among a large set of paralogs: the case of PE/PPE proteins of Mycobacterium tuberculosis. authors,R. Riley,M. Pellegrini,D. Eisenberg PLoS Comput. Biol. 2008	gaat3s	NAS	18787688	Operon (Functional linkage)
Interaction	PhysicalInteraction Rv1788	gaat3s	NAS		Operon (Functional linkage) authors,R. Riley,M. Pellegrini,D. Eisenberg Identifying cognate binding pairs among a large set of paralogs: the case of PE/PPE proteins of Mycobacterium tuberculosis. PLoS Comput. Biol. 2008
Symbol	PPE25-PE19	jlew			Mutant is defective in ESXN and PPE41 secretion. Mutant is attenuated in macrophages and SCID mice. authors,D. Bottai,M. Di Luca,L. Majlessi,W. Frigui,R. Simeone,F. Sayes,W. Bitter,MJ. Brennan,C. Leclerc,G. Batoni,M. Campa,R. Brosch,S. Esin Disruption of the ESX-5 system of Mycobacterium tuberculosis causes loss of PPE protein secretion, reduction of cell wall integrity and strong attenuation. Molecular microbiology 2012
Citation	Disruption of the ESX-5 system of Mycobacterium tuberculosis causes loss of PPE protein secretion, reduction of cell wall integrity and strong attenuation. authors,D. Bottai,M. Di Luca,L. Majlessi,W. Frigui,R. Simeone,F. Sayes,W. Bitter,MJ. Brennan,C. Leclerc,G. Batoni,M. Campa,R. Brosch,S. Esin Molecular microbiology 2012	jlew		22340629	Mutant is defective in ESXN and PPE41 secretion. Mutant is attenuated in macrophages and SCID mice.

TB Genome Annotation Portal