ProForma 2.0
validated simple linear
RKKRRQRRRGGGGVVVHINGGKFGGGGSRQIKIWFQNRRMKWKK
R44KS
Aliases: R44KS
Normalized sequence
RKKRRQRRRGGGGVVVHINGGKFGGGGSRQIKIWFQNRRMKWKK
44 amino acids
Release PepDiana-V1-20260620
36
Activity records
1
Source papers
23
Positive
13
Negative / threshold
Versioned scientific descriptors
No separate physicochemical property was reported in the primary-literature identity record. PepDiana release values are shown as computed properties.
Molecular weight
5163.0443 Da
Molecular formula
C226H379N87O51S
Theoretical pI
12
Net charge at pH 7
15.8402
GRAVY
-1.3977
Instability index
100.8705
Aromaticity
0.0909
Topological polar surface area
2349.8 Ų
cLogP
-25.8707
Hydrogen-bond donors
88
Hydrogen-bond acceptors
69
Rotatable bonds
187
Method: PepDiana sequence/structure descriptor pipeline
Tool: Biopython+RDKit · Biopython 1.85; RDKit 2024.09.6
Calculated: 2026-06-20T11:01:38.358971+00:00
Assumptions: ph=7; termini=free N-terminus and free C-terminus for simple linear peptides; stereochemistry=standard L-amino acids; smiles_length_limit=200
ProForma 2.0
validated simple linear
RKKRRQRRRGGGGVVVHINGGKFGGGGSRQIKIWFQNRRMKWKK
HELM 2.0
validated simple linear
PEPTIDE1{R.K.K.R.R.Q.R.R.R.G.G.G.G.V.V.V.H.I.N.G.G.K.F.G.G.G.G.S.R.Q.I.K.I.W.F.Q.N.R.R.M.K.W.K.K}$$$$V2.0
Canonical SMILES
validated
CCC(C)C(NC(=O)C(Cc1c[nH]cn1)NC(=O)C(NC(=O)C(NC(=O)C(NC(=O)CNC(=O)CNC(=O)CNC(=O)CNC(=O)C(CCCNC(=N)N)NC(=O)C(CCCNC(=N)N)NC(=O)C(CCCNC(=N)N)NC(=O)C(CCC(N)=O)NC(=O)C(CCCNC(=N)N)NC(=O)C(CCCNC(=N)N)NC(=O)C(CCCCN)NC(=O)C(CCCCN)NC(=O)C(N)CCCNC(=N)N)C(C)C)C(C)C)C(C)C)C(=O)NC(CC(N)=O)C(=O)NCC(=O)NCC(=O)NC(CCCCN)C(=O)NC(Cc1ccccc1)C(=O)NCC(=O)NCC(=O)NCC(=O)NCC(=O)NC(CO)C(=O)NC(CCCNC(=N)N)C(=O)NC(CCC(N)=O)C(=O)NC(C(=O)NC(CCCCN)C(=O)NC(C(=O)NC(Cc1c[nH]c2ccccc12)C(=O)NC(Cc1ccccc1)C(=O)NC(CCC(N)=O)C(=O)NC(CC(N)=O)C(=O)NC(CCCNC(=N)N)C(=O)NC(CCCNC(=N)N)C(=O)NC(CCSC)C(=O)NC(CCCCN)C(=O)NC(Cc1c[nH]c2ccccc12)C(=O)NC(CCCCN)C(=O)NC(CCCCN)C(=O)O)C(C)CC)C(C)CC
Isomeric SMILES
validated
CC[C@H](C)[C@H](NC(=O)[C@H](Cc1c[nH]cn1)NC(=O)[C@@H](NC(=O)[C@@H](NC(=O)[C@@H](NC(=O)CNC(=O)CNC(=O)CNC(=O)CNC(=O)[C@H](CCCNC(=N)N)NC(=O)[C@H](CCCNC(=N)N)NC(=O)[C@H](CCCNC(=N)N)NC(=O)[C@H](CCC(N)=O)NC(=O)[C@H](CCCNC(=N)N)NC(=O)[C@H](CCCNC(=N)N)NC(=O)[C@H](CCCCN)NC(=O)[C@H](CCCCN)NC(=O)[C@@H](N)CCCNC(=N)N)C(C)C)C(C)C)C(C)C)C(=O)N[C@@H](CC(N)=O)C(=O)NCC(=O)NCC(=O)N[C@@H](CCCCN)C(=O)N[C@@H](Cc1ccccc1)C(=O)NCC(=O)NCC(=O)NCC(=O)NCC(=O)N[C@@H](CO)C(=O)N[C@@H](CCCNC(=N)N)C(=O)N[C@@H](CCC(N)=O)C(=O)N[C@H](C(=O)N[C@@H](CCCCN)C(=O)N[C@H](C(=O)N[C@@H](Cc1c[nH]c2ccccc12)C(=O)N[C@@H](Cc1ccccc1)C(=O)N[C@@H](CCC(N)=O)C(=O)N[C@@H](CC(N)=O)C(=O)N[C@@H](CCCNC(=N)N)C(=O)N[C@@H](CCCNC(=N)N)C(=O)N[C@@H](CCSC)C(=O)N[C@@H](CCCCN)C(=O)N[C@@H](Cc1c[nH]c2ccccc12)C(=O)N[C@@H](CCCCN)C(=O)N[C@@H](CCCCN)C(=O)O)[C@@H](C)CC)[C@@H](C)CC
Paper-level observations
Table 1: R44K^S against MRSA (SA 180-F Strain) shows ↓ (0.1 mg/mL).
Table 1: R44K^S against S. aureus (129B Strain) shows ↓ (10 mg/mL).
Table 1: R44K^S against E. coli (MG1655 Strain) shows ↓ (0.1 mg/mL).
Table 1: R44K^S against P. aeruginosa (2943 Strain) shows ↓ (10 mg/mL).
Table 2: R44K^S at 1 mg/mL against MRSA shows + (inhibition zone).
Table 2: R44K^S at 0.1 mg/mL against MRSA shows − (no inhibition zone).
Table 2: R44K^S at 0.01 mg/mL against MRSA shows − (no inhibition zone).
Table 2: R44K^S at 0.001 mg/mL against MRSA shows − (no inhibition zone).
Table 2: R44K^S at 1 mg/mL against S. aureus 129B shows + (inhibition zone).
Table 2: R44K^S at 0.1 mg/mL against S. aureus 129B shows − (no inhibition zone).
Table 2: R44K^S at 0.01 mg/mL against S. aureus 129B shows − (no inhibition zone).
Table 2: R44K^S at 0.001 mg/mL against S. aureus 129B shows − (no inhibition zone).
Table 2: R44K^S at 1 mg/mL against E. coli MG1655 shows − (no inhibition zone).
Table 2: R44K^S at 0.1 mg/mL against E. coli MG1655 shows − (no inhibition zone).
Table 2: R44K^S at 0.01 mg/mL against E. coli MG1655 shows − (no inhibition zone).
Table 2: R44K^S at 0.001 mg/mL against E. coli MG1655 shows − (no inhibition zone).
Table 2: R44K^S at 1 mg/mL against P. aeruginosa 2943 shows + (inhibition zone).
Table 2: R44K^S at 0.1 mg/mL against P. aeruginosa 2943 shows − (no inhibition zone).
Table 2: R44K^S at 0.01 mg/mL against P. aeruginosa 2943 shows − (no inhibition zone).
Table 2: R44K^S at 0.001 mg/mL against P. aeruginosa 2943 shows − (no inhibition zone).
Table 3: R44K^S against MRSA early biofilm after crystal violet staining shows ↓ (1 mg/mL).
Table 3: R44K^S against S. aureus 129B early biofilm after crystal violet staining shows ↑ (reverse effect).
Table 3: R44K^S against E. coli MG1655 early biofilm after crystal violet staining shows ↑ (reverse effect).
Table 3: R44K^S against P. aeruginosa 2943 early biofilm after crystal violet staining shows ↓ (10 mg/mL).
Table 3: R44K^S against MRSA early biofilm after MTT assay shows ↑ (reverse effect).
Table 3: R44K^S against S. aureus 129B early biofilm after MTT assay shows ↑ (reverse effect).
Table 3: R44K^S against E. coli MG1655 early biofilm after MTT assay shows − (no decrease).
Table 3: R44K^S against P. aeruginosa 2943 early biofilm after MTT assay shows − (no decrease).
Table 4: R44K^S against MRSA mature biofilm after crystal violet staining shows ↑ (reverse effect).
Table 4: R44K^S against S. aureus 129B mature biofilm after crystal violet staining shows ↑ (reverse effect).
Table 4: R44K^S against E. coli MG1655 mature biofilm after crystal violet staining shows ↑ (reverse effect).
Table 4: R44K^S against P. aeruginosa 2943 mature biofilm after crystal violet staining shows ↑ (reverse effect).
Table 4: R44K^S against MRSA mature biofilm after MTT assay shows ↓ (0.01 mg/mL).
Table 4: R44K^S against S. aureus 129B mature biofilm after MTT assay shows − (no decrease).
Table 4: R44K^S against E. coli MG1655 mature biofilm after MTT assay shows ↑ (reverse effect).
Table 4: R44K^S against P. aeruginosa 2943 mature biofilm after MTT assay shows ↑ (reverse effect).
Citation and release provenance
Cite this identity as PepDiana record PEPDIA-PLP-002458, release PepDiana-V1-20260620. Experimental observations retain their paper, mention, and activity-record identifiers.
Record updated: 2026-06-22T07:14:26.229247+00:00