Physicochemical Properties of Peptide



PPepDB ID:PPepDB_4545
Number of amino acids:322
Molecular Weight:35568.19 Da
Theoretical pI:8.91


Amino Acid Composition:


Amino acidAmino acid countAmino acid percentage
Alanine ALA (A)206.21%
Cysteine CYS (C)30.93%
Glutamic Acid GLU (E)206.21%
Aspartic Acid ASP (D)113.42%
Glycine GLY (G)257.76%
Phynylalanine PHE (F)134.04%
Isoleucine ILE (I)268.07%
Histidine HIS (H)30.93%
Lysine LYS (K)247.45%
Methionine MET (M)82.48%
Leucine LEU (L)257.76%
Asparagine ASN (N)195.9%
Glutamine GLN (Q)175.28%
Proline PRO (P)247.45%
Serine SER (S)206.21%
Arginine ARG (R)123.73%
Threonine THR (T)103.11%
Tryptophan TRP (W)10.31%
Valine VAL (V)299.01%
Tyrosine TYR (Y)123.73%


Atomic Composition:


ElementElement's AbbreviationCount
CarbonC1605
HydrogenH2557
NitrogenN425
OxygenO463
SulphurS11

FormulaC1605H2557N425O463S11
Total Number of Atoms:5061


Total number of positively charged residues (ARG + LYS):36
Total number of negatively charged residues (ASP + GLU):31
Extinction Coefficient:Extinction coefficients are in units of M-1 cm-1, at 280 nm measured in water.

Ext. coefficient    23505
Absorption 0.1% (=1 g/l)    0.661,   assuming all pairs of CYS residues form cystines

Ext. coefficient    23380
Absorption 0.1% (=1 g/l)    0.657,   assuming all CYS residues are reduced
Aromaticity:0.081

Aromaticity is the calculated relative frequency of Phe+Trp+Tyr
Instability Index:The computed Instability Index (II) is : 30.21

This indicates that the protein/peptide is stable
Secondary Structure Fraction [Helix, Turn, Sheet]:[32.92, 27.33, 22.67]

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:94.0994
Grand average of hydropathicity (GRAVY):-0.16