Physicochemical Properties of Peptide



PPepDB ID:PPepDB_5025
Number of amino acids:321
Molecular Weight:34536.62 Da
Theoretical pI:5.05


Amino Acid Composition:


Amino acidAmino acid countAmino acid percentage
Alanine ALA (A)299.03%
Cysteine CYS (C)82.49%
Glutamic Acid GLU (E)134.05%
Aspartic Acid ASP (D)185.61%
Glycine GLY (G)257.79%
Phynylalanine PHE (F)257.79%
Isoleucine ILE (I)175.3%
Histidine HIS (H)30.93%
Lysine LYS (K)92.8%
Methionine MET (M)82.49%
Leucine LEU (L)319.66%
Asparagine ASN (N)164.98%
Glutamine GLN (Q)123.74%
Proline PRO (P)195.92%
Serine SER (S)247.48%
Arginine ARG (R)154.67%
Threonine THR (T)206.23%
Tryptophan TRP (W)00%
Valine VAL (V)268.1%
Tyrosine TYR (Y)30.93%


Atomic Composition:


ElementElement's AbbreviationCount
CarbonC1541
HydrogenH2423
NitrogenN409
OxygenO459
SulphurS16

FormulaC1541H2423N409O459S16
Total Number of Atoms:4848


Total number of positively charged residues (ARG + LYS):24
Total number of negatively charged residues (ASP + GLU):31
Extinction Coefficient:This protein does not contain any Tryptophan residues. Experience shows that this could result in more than 10% error in the computed extinction coefficient.

Extinction coefficients are in units of M-1 cm-1, at 280 nm measured in water.

Ext. coefficient    4970
Absorption 0.1% (=1 g/l)    0.144,   assuming all pairs of CYS residues form cystines

Ext. coefficient    4470
Absorption 0.1% (=1 g/l)    0.129,   assuming all CYS residues are reduced
Aromaticity:0.087

Aromaticity is the calculated relative frequency of Phe+Trp+Tyr
Instability Index:The computed Instability Index (II) is : 36.06

This indicates that the protein/peptide is stable
Secondary Structure Fraction [Helix, Turn, Sheet]:[31.78, 26.17, 25.23]

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:90.8411
Grand average of hydropathicity (GRAVY):0.20