Physicochemical Properties of Peptide



PPepDB ID:PPepDB_4449
Number of amino acids:365
Molecular Weight:39378.06 Da
Theoretical pI:5.91


Amino Acid Composition:


Amino acidAmino acid countAmino acid percentage
Alanine ALA (A)349.32%
Cysteine CYS (C)82.19%
Glutamic Acid GLU (E)195.21%
Aspartic Acid ASP (D)123.29%
Glycine GLY (G)256.85%
Phynylalanine PHE (F)184.93%
Isoleucine ILE (I)277.4%
Histidine HIS (H)61.64%
Lysine LYS (K)215.75%
Methionine MET (M)143.84%
Leucine LEU (L)4311.78%
Asparagine ASN (N)154.11%
Glutamine GLN (Q)123.29%
Proline PRO (P)133.56%
Serine SER (S)328.77%
Arginine ARG (R)61.64%
Threonine THR (T)226.03%
Tryptophan TRP (W)30.82%
Valine VAL (V)287.67%
Tyrosine TYR (Y)71.92%


Atomic Composition:


ElementElement's AbbreviationCount
CarbonC1774
HydrogenH2840
NitrogenN446
OxygenO516
SulphurS22

FormulaC1774H2840N446O516S22
Total Number of Atoms:5598


Total number of positively charged residues (ARG + LYS):27
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    27430
Absorption 0.1% (=1 g/l)    0.697,   assuming all pairs of CYS residues form cystines

Ext. coefficient    26930
Absorption 0.1% (=1 g/l)    0.684,   assuming all CYS residues are reduced
Aromaticity:0.077

Aromaticity is the calculated relative frequency of Phe+Trp+Tyr
Instability Index:The computed Instability Index (II) is : 42.66

This indicates that the protein/peptide is unstable
Secondary Structure Fraction [Helix, Turn, Sheet]:[34.52, 23.29, 30.14]

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:106.356
Grand average of hydropathicity (GRAVY):0.40