Physicochemical Properties of Peptide



PPepDB ID:PPepDB_5476
Number of amino acids:351
Molecular Weight:38645.86 Da
Theoretical pI:5.75


Amino Acid Composition:


Amino acidAmino acid countAmino acid percentage
Alanine ALA (A)267.41%
Cysteine CYS (C)92.56%
Glutamic Acid GLU (E)82.28%
Aspartic Acid ASP (D)257.12%
Glycine GLY (G)185.13%
Phynylalanine PHE (F)226.27%
Isoleucine ILE (I)174.84%
Histidine HIS (H)51.42%
Lysine LYS (K)92.56%
Methionine MET (M)51.42%
Leucine LEU (L)4011.4%
Asparagine ASN (N)257.12%
Glutamine GLN (Q)154.27%
Proline PRO (P)195.41%
Serine SER (S)298.26%
Arginine ARG (R)205.7%
Threonine THR (T)287.98%
Tryptophan TRP (W)20.57%
Valine VAL (V)236.55%
Tyrosine TYR (Y)61.71%


Atomic Composition:


ElementElement's AbbreviationCount
CarbonC1710
HydrogenH2690
NitrogenN472
OxygenO521
SulphurS14

FormulaC1710H2690N472O521S14
Total Number of Atoms:5407


Total number of positively charged residues (ARG + LYS):29
Total number of negatively charged residues (ASP + GLU):33
Extinction Coefficient:Extinction coefficients are in units of M-1 cm-1, at 280 nm measured in water.

Ext. coefficient    20440
Absorption 0.1% (=1 g/l)    0.529,   assuming all pairs of CYS residues form cystines

Ext. coefficient    19940
Absorption 0.1% (=1 g/l)    0.516,   assuming all CYS residues are reduced
Aromaticity:0.085

Aromaticity is the calculated relative frequency of Phe+Trp+Tyr
Instability Index:The computed Instability Index (II) is : 43.34

This indicates that the protein/peptide is unstable
Secondary Structure Fraction [Helix, Turn, Sheet]:[31.34, 25.93, 22.51]

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:89.7435
Grand average of hydropathicity (GRAVY):-0.06