Physicochemical Properties of Peptide



PPepDB ID:PPepDB_5326
Number of amino acids:292
Molecular Weight:30774.43 Da
Theoretical pI:4.46


Amino Acid Composition:


Amino acidAmino acid countAmino acid percentage
Alanine ALA (A)3311.3%
Cysteine CYS (C)62.05%
Glutamic Acid GLU (E)62.05%
Aspartic Acid ASP (D)186.16%
Glycine GLY (G)299.93%
Phynylalanine PHE (F)175.82%
Isoleucine ILE (I)186.16%
Histidine HIS (H)31.03%
Lysine LYS (K)103.42%
Methionine MET (M)41.37%
Leucine LEU (L)268.9%
Asparagine ASN (N)206.85%
Glutamine GLN (Q)124.11%
Proline PRO (P)134.45%
Serine SER (S)3612.33%
Arginine ARG (R)31.03%
Threonine THR (T)93.08%
Tryptophan TRP (W)72.4%
Valine VAL (V)144.79%
Tyrosine TYR (Y)82.74%


Atomic Composition:


ElementElement's AbbreviationCount
CarbonC1378
HydrogenH2084
NitrogenN356
OxygenO426
SulphurS10

FormulaC1378H2084N356O426S10
Total Number of Atoms:4254


Total number of positively charged residues (ARG + LYS):13
Total number of negatively charged residues (ASP + GLU):24
Extinction Coefficient:Extinction coefficients are in units of M-1 cm-1, at 280 nm measured in water.

Ext. coefficient    50795
Absorption 0.1% (=1 g/l)    1.651,   assuming all pairs of CYS residues form cystines

Ext. coefficient    50420
Absorption 0.1% (=1 g/l)    1.638,   assuming all CYS residues are reduced
Aromaticity:0.110

Aromaticity is the calculated relative frequency of Phe+Trp+Tyr
Instability Index:The computed Instability Index (II) is : 34.32

This indicates that the protein/peptide is stable
Secondary Structure Fraction [Helix, Turn, Sheet]:[30.82, 33.56, 23.63]

Amino acids in helix: V, I, Y, F, W, L || Amino acids in turn: N, P, G, S || Amino acids in sheet: E, M, A, L
Aliphatic index:83.9726
Grand average of hydropathicity (GRAVY):0.09