Physicochemical Properties of Peptide



PPepDB ID:PPepDB_4475
Number of amino acids:717
Molecular Weight:77634.92 Da
Theoretical pI:6.24


Amino Acid Composition:


Amino acidAmino acid countAmino acid percentage
Alanine ALA (A)436%
Cysteine CYS (C)70.98%
Glutamic Acid GLU (E)294.04%
Aspartic Acid ASP (D)415.72%
Glycine GLY (G)486.69%
Phynylalanine PHE (F)253.49%
Isoleucine ILE (I)375.16%
Histidine HIS (H)152.09%
Lysine LYS (K)395.44%
Methionine MET (M)152.09%
Leucine LEU (L)8211.44%
Asparagine ASN (N)506.97%
Glutamine GLN (Q)253.49%
Proline PRO (P)446.14%
Serine SER (S)8812.27%
Arginine ARG (R)253.49%
Threonine THR (T)395.44%
Tryptophan TRP (W)50.7%
Valine VAL (V)466.42%
Tyrosine TYR (Y)141.95%


Atomic Composition:


ElementElement's AbbreviationCount
CarbonC3419
HydrogenH5457
NitrogenN941
OxygenO1074
SulphurS22

FormulaC3419H5457N941O1074S22
Total Number of Atoms:10913


Total number of positively charged residues (ARG + LYS):64
Total number of negatively charged residues (ASP + GLU):70
Extinction Coefficient:Extinction coefficients are in units of M-1 cm-1, at 280 nm measured in water.

Ext. coefficient    48735
Absorption 0.1% (=1 g/l)    0.628,   assuming all pairs of CYS residues form cystines

Ext. coefficient    48360
Absorption 0.1% (=1 g/l)    0.623,   assuming all CYS residues are reduced
Aromaticity:0.061

Aromaticity is the calculated relative frequency of Phe+Trp+Tyr
Instability Index:The computed Instability Index (II) is : 41.70

This indicates that the protein/peptide is unstable
Secondary Structure Fraction [Helix, Turn, Sheet]:[29.15, 32.08, 23.57]

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:89.3304
Grand average of hydropathicity (GRAVY):-0.23